ok, I'll play devil's advocate....
First tho, I have to admit that I am a USP lover. I have a USP45f and its my favorite pistol I have ever owned, warts and all.
You have heard a lot about the good things (and I heartily agree), let me tell you about the bad things....
1. the checkerboard stipling on the backstrap of the USP's hurts some people's hands. If you have outdoor hands or mechanics hands I cant imagine it would be a problem. But it hurts my wife.
2. The USP compacts arent. Compact that is... They are probably the bulkiest compacts money can buy. and they are kind squareish
3. Speaking of money... they arent cheap. not remotely. well, you can spend as much as you wnt on a custom pistol, but out of the box they are almost as expensive as you can go.
4. Their double action trigger is one of the worst in the industry. You can spring 100-150$ to put in a match trigger, but that gets the price of the pistol near astronomical and still doesnt always solve the gritty trigger problem.
5. The compacts use a plastic bushing instead of a second recoil spring ro their recoil dampening. The full size use the second spring and it works better.
6. Now let me send some ideas your way of other pistols to look at that are not as expensive or not as bulky or both. And unless you are going to swim a river, low crawl a desert and wallow in a mudhole they are probably just as reliable and accurate.
Look at Sig, Beretta, CZ, and Walther. All make fine handguns that wil lprobably fit your bill a little more comfortably and cheaper with similar reliability and beter ergonomics.
If you want to look at more expensive pistols, look at the P7 by HK... now THATS a sweet compact nine mm.
All that said....
I'd probably buy a USP9... I like the feel, I like the controls and I can live with the crappy trigger. And they feed ANYHING!
Hell, the'd probably feed a .22 if you stuck it in there!
(just kidding, DONT try that)
J.T.
As usual, IMHO, YMMV, FWIW and all that