Now that you have decided on a 38/357 you can start to narrow things down some.
After reading every post above, it looks to me like you are more interested in a Range, Home Defense, and Trail Gun combination more than a concealed carry revolver at the moment. That also helps quite a bit on deciding what will work well for you.
In my 40+ years of packing handguns around, I find a 6" gun to be a little too long to be handy to carry. I believe you want the maximum length of barrel you can pack around handy for accuracy and recoil management. So lets go with a 4" barrel.
You do have several choices in a 4" 38/357 revolver.
You specified a No Loc in a S&W.
I believe my first two picks would be a S&W 686 Pre Loc 4" OR
A Ruger GP100 in a 4".
If you go gun shopping look at the S&W 19/66 in a K Frame 357 if you can find any around.
At some point when you decide to conceal carry, pick up something shorter, like a 2.5" 66 S&W.
Once you get your baby. Make an order with Ray at Lobo and get a holster to carry it in. I would go with an Enhanced Pancake myself. I normally get the Optional Inner Hammer Shield to keep my shirt out of the holster when reholstering. If you are real active, he has a Thumb Break Option also.
http://lobogunleather.com/
You will also want a good quality heavy 1.5" leather belt. I normally buy a (Very Good) solid brass buckel and have my local saddlemaker build my belts.
If you get a
very nice buckel, you can recycle it from belt to belt for years.
Ammunition Carrier: I have worked with different ammunition carry options over the years. I probably carry the most (for 38/357) in a belt pouch in a Tuff Products Speed Strip. Lobo can make you a pouch from leather that will last you a very long time.
Don't skimp on leather. This makes all the difference carrying.
That is about all the advice I have for you. I guess if you did not mind a little more weight you could add the N Frame 357's to your list. They would be the Model 28, 27, and 627 in steel guns.
Bob