H&K all the way
I have 3 H&Ks. Mark 23, Full USP .45, and Compact USP .45, and I will swear my life by them. I have owned just about all the brands out there, including the ones you listed. I choose H&K for the following reasons, keeping in mind that each shooter does well with what they feel most confortable with.
1. Reliability- Absolutely no mis-feeds or jams, malfunctions or breakage.
2. Durability- Hostile environment finish on every model, resists sweat, corrosion, and H&K markets their USP line to be able to constantly fire +p rounds. (I have done it without issue)
3. Performance- I have the stock night sights, big blades make aquisition of the target in all conditions quick and superior to most all other makes, allows consistent shot groups. Double action is much smoother that many other makes. Allows you to carry cocked and locked, double action on first round to single, and safety is also a decocking device.
These are my reasons, not everyone thinks that the above is true, mine is based off of experience with Colt, Kimber, S&W, Walther, Ruger, Beretta, Glock, Sig Sauer, IMI, and others. I found the H&K line to be superior.