I am thinking it would be a choice between Para Ordnance P14 and HK USP. Both hold 12 rounds of .45ACP, right? Or .13 rounds of .40.
The P14 holds 14+1, the USP holds 12 rounds. The Usp is cheaper then the P14 that I am going to buy, but I wanted the higher capacity of the p14, I liked the finish/look of it more, and I like the feel of the metal Vs the plastic of the hk. Don't get me wrong, the USP is a fine gun, and I wouldn't mind having one any day (especially compared to a glock). I just decided if I was going to blow my budget for a firearm, I might as well get what I really wanted. I would personally recommend that you actually go out to a shop, and fire any handgun that your interested in. You can talk about them all day, and keep dreaming about which one is better, but at a certain point you have to find out for yourself
One thing I have found, is the handgun world is much like the car audio world. Since car audio is a big hobby of mine I deal with it day in and day out. There are people that wont settle for anything less then 4 15" sub woofers, and there are people who only want one 8 inch sub. People always ask me what I like for speakers, and I do have my preferred brands of course. What I like and what other people like are often two different things. That's why I use the mentality, get recommendation on good brands, listen to said brands, buy what you like.
The same can be said about a handgun. Get information on good companies, go to the gun shop and try out said pistols, and buy what fits your needs. You can buy a firearm without trying it, I don't recommend that, unless you have a good experience with the same or similar model. Take other peoples recommendations as that, recommendations. What works for one person doesn't for others. Kind of like how I would love to have a desert eagle, because it fits my hand very well, and fires magnum calibers very well. For someone with small hands, the desert eagle is often to big, and not comfortable.