But that leaves the question, is there any good schools that do classes where a semi auto, or a revolver would be equally appropriate?
Yes, I have. I took three N-Frame revolvers to a two day defensive handgun course. That does answer your question, but my guess is that you're looking for some details.
The primary issue was that the instructor was not a revolver guy and did not know how to coach revolver shooters. He was not able to assist in tuning trigger control or reloads.
Make sure the instructor is a revolver guy or all you're doing is training yourself for part of the class. You'll still learn tactics and such, but you'll be on your own for figuring out how to improve your groups and do a faster reload.
Many of the drills were not six shot centric. This is a good thing in my opinion because it makes you reload during the string. Reloading will occupy much of your time in the course. This is great since you'll get many repetitions--but make sure you do each rep consistently.
Also, your shooting will be slow. Your double taps will be more like controlled pairs from a semi-auto. Keep this in mind and focus upon shooting well over keeping up. You won't be able to unless you're already a proficient revolver shooter.
Keep in mind that your gun will get really hot. You will feel the heat if you have an IWB holster and you may burn your arms and hands. You will permanently burn the bottom edge of the forcing cone into multiple locations on the back of your right hand. Wear fingerless leather gloves on the hand that will push the cylinder out during reloading. You can use duct tape if you forget them. Take an identical gun and swap them out periodically to minimize the annoyances from heat.
Take a second gun, preferably three. They get very dirty after a few hours and can start jamming up. Take a cleaning kit and clean everything at lunch. Use FMJ ammunition or tuned lead ammunition that will not lead the barrel and forcing cone. This is very important. Lead also makes the outside of the gun very cruddy, so take hand wipes to clean your hands. They'll be dark gray by the end of the day.
Buy the moonclip tool if you use moonclips. If you use speed loaders, buy two or three loading trays and prep them. Perhaps keep them in a box and take the box to the line. Make sure to have at least 6-10 speed loaders and at least two belt holders (or keep them in your pocket). You had better have 20 loaded moonclips; they take awhile to strip and load up. If possible, load ALL your ammo into moonclips prior to starting the course so you don't have to mess with it. I bought 100 moonclips from Ranch Products and loaded 50 of them prior to class. Take a 2 1/2 gallon bucket for the empties. Speedloaders do not have this problem at the cost of a slower reload.
Improve the sights on your guns. Black front sights stink. Many courses shoot at targets with pictures of clothed criminals on them. Black sights disappear and you'll end up point shooting. At the very least have a white dot; gold dots, fiber optics, and night sights are much better.
Holster selection is critical. You MUST be able to holster your handgun easily because you'll do hundreds of draws during the course. A holster without a reinforced mouth will collapse as you sweat on it. This will cause you to do all sorts of weird stuff with your gun that you wouldn't do normally. These gyrations will create a bad habit, so avoid it with a solid holster. Avoid pancake holsters with thumb straps for the course. You'll waste too much time snapping it closed, so go open top only. Safariland makes a few K and L/GP frame belt holsters. Some people will argue that you should attend using your normal carry holster. I assert that it doesn't matter so long as the gun is positioned in a similar way. If that were the case, I'd have to take 100 classes just to accommodate the myriad of holsters I currently own and use in different positions (strong side, appendix, pocket, off-body, etc). In general, I take a standard OWB holster with only basic retention and some forward cant.
Longer barrels make life easier. I shoot a gun with 5" barrel 33% better than one with 4" barrel and a whole lot better than one with 3" barrel. Snubs are great for carry, but can you make it through 500+ rounds in two days? I know I cannot, so I use and carry large frame revolvers in class. Minimize your use of magnum cartridges. You'll really feel it after the first day and you need to be able to hold the gun to complete the second day. Once I attended a class with a Glock 23 and couldn't hold the gun after 200 rounds. I switched hands and could barely complete the course. Don't batter your hands needlessly!
I buy my stuff at speedloaderstore.com. They are prompt and buying six Comp I's and holders was very quick and easy.
ut between old habits and and an old injury on my non dominant hand that makes it difficult to grasp the slide, I can't help but feel revolvers are where I should just stay.
Run the slide off your shoe, pocket edge, belt or the corner of some object. Use the slide release or grab the entire back half of the slide. If you use an object, make sure the rear sight is very robust and has an edge you can catch.