I own a USP, and enjoy shooting it very much. A new full size will run you between 750-800 bone.
Mine is a variant one (DA/SA with safety lever), and I think it is a great carry option. You can either carry in DA safety on or off, and cocked and locked. Many people complain about the trigger pull in DA, but I have no gripes with it. My first shot is always dead on balls accurate (Not really sure how to classify the shots after the first, but that is a topic for another discussion).
It makes for a perfect CCW during the winter months when you are wearing heavy clothing because it is a behemoth. My body type pretty much allows me to carry with just a size L T-Shirt to conceal.
The nice thing about it being fairly large is that the recoil is not too bad. Also, the capacity is nice at 13+1.
Another Down side is that the checkering on the front strap rips the crap out of my hand.
Overall, I really enjoy shooting the USP and it is probably more accurate than I will ever be (Hopefully with some more practice I can over come this). Buy with confidence, you will definitely enjoy it.