I bought a browning buckmark (.22) when I was active in intercollegiate standard pistol competition, and I like it a lot. It can be bought in several "trim" editions, can be customized with better sights, triggers, grips, etc., it's more accurate than you'll ever be, and it's cheap fun to shoot. 10 round magazine.
The only drawback is that it has no decocking lever so anytime there is a round in the chamber and the safety is off, it's ready to go single-action. There is no double-action at all with this gun. It has a good safety but I don't trust it, so you simply can't walk around with a round in the chamber unless you're looking to shoot yourself in the foot. I used to take it with me when rabbit hunting and I just left the chamber empty when it was in the holster. When I wanted to use it, I pulled it out, cycled the slide, and when done firing I dropped the magazine and cleared the weapon prior to putting it back in the hoster. It's a bit of a pain, but the gun was designed for target shooting, not field work.
For a neat field revolver, my Dad has a S&W K-22. It is built on the same frame as their .38, but it holds 6 .22 rounds instead of .38. It's a great field gun because it's extremely simple and reliable. I'm told it was very popular back when police units carried .38s because it gave them something cheap to shoot that was nearly identical to their service weapon. I don't know if they're in production or how much they cost, but they're pretty accurate and fun too.
If you want something meaty, I've been extremely pleased with my Beretta .40 stainless. It weighs about twice what a glock or S&W compact .40 would weigh, but that also means it is very easy on the wrist and easy to keep pointed downrange for multiple shots. The military standard is the beretta in 9mm and the 9mm ammo is pretty cheap, but the 9mm rounds are pretty weak compared to the .40.
