I bought a P11, took it to the range, then right back to the gun store and traded it in towards a used K9 and haven't regretted the decision. It's a compact, solid, carry gun and well worth the three rounds capacity I sacrificed. I used to think the trigger on Kahrs were excessively long, until I tried to P11. Then I loved the Kahr trigger. Nothing against the Kel-Tec pistol, just not my cup of tea. Can't help you with the Sig, I've never had or shot one.
"Oh, and another 9mm in your price range, though not a single stack, is the FM M95 Detective Hi Power. You can find it at Sarco for $299 + shipping. Add in your FFL transfer fees and it's still well within your price range."
I had one of these and I was not impressed with it. I had reliabilty problems that I assume were due to the shorter slide. It felt like it was kicking an lot of kick for being an all steel 9mm. I think maybe the recoil springs were not strong enough to make up for the reduced weight in the slide. It was not that much smaller than a regular BHP and in no way compares to a K-9 is terms of size. The grip, like all BHPs was very comfy but that is about all I can good about the gun. It had a horrible trigger and the sights and safety were much too small to use. After you factor in the cost of a new safety and sights and remove the mag safety and possibly get a trigger job, you might as well get a nice 'real' BHP.
The P11 is a double stack. The new PF9 will be Kel Tec's single stack.
I bought a P11, took it to the range, then right back to the gun store and traded it in towards a used K9 and haven't regretted the decision. It's a compact, solid, carry gun and well worth the three rounds capacity I sacrificed. I used to think the trigger on Kahrs were excessively long, until I tried to P11. Then I loved the Kahr trigger. Nothing against the Kel-Tec pistol, just not my cup of tea. Can't help you with the Sig, I've never had or shot one.
Different strokes, I guess. I tried a Kahr when I went compact 9 shopping and didn't like the trigger, too short, dangerous IMHO for concealed carry, heavy, too big for a pocket. The P11 was much lighter, fits some big pockets, longer trigger is true revolver like DAO, safe to carry.
Everyone has preferences. Some folks can't handle revolver DA and want a single action without safeties. Glocks are great for them. Kahrs approximate Glocks without the trigger safety. I shoot DA just fine, better than a lot of shooters I've seen handle a 1911's single action and I like a safe gun in my pocket. ADs are not an acceptable risk, to me anyway, and I think the trend in lighter and lighter triggers on "da" guns is getting a little ridiculous. If you want an easy trigger, buy a gun with a safety on it and carry it condition one, cocked and locked. The 1911 is safe to carry, redundant safeties, and has about the best SA trigger an automatic can have. If I couldn't shoot DA, I'd be totin' a lightweight officers ACP, personally, ore maybe a lightweight commander. It's handy, lightish, and there is no better trigger on the planet. If you can't shoot a 1911, you need to give up pistols.
I do however, disagree with the idea that the Kahr is more prone to ADs than the other two. It has several safety features that keep it from firing until the trigger is pulled. As far as NDs go, as long as you carry it in a good holster that protects the trigger and keep your finger off the trigger then you won't have to worry about either an AD or a ND. The K9, the 642 and the P11 all share that aspect. If you pull the trigger they will go off.
If you don't like that then carry a single action cocked and locked. But the safety on it is no substitute for safe gun handling and keeping your finger off the trigger until you're ready to destroy something.