My $ 0.02 worth:
I have a
HK USP Full size w. MMC Adjustable Nite Site
Glock Model 30
S&W Performance Center Recon-.45 ported & night sights (pre S&W sell out purchase)
Kimber Stainless Gold Match .45
I like the HK USP the best when size is not a concern, it just feels good in my hand and it is very accurate.
I think the Glock shoots as well as the HK USP and it is smaller and cheaper.
I had to send back the S&W because it shot about 12" low and right with its fixed sights at 10 yards. They fixed it, installed adjustable sights and made the gun look like it came from the custom shop by removing all of the tool marks on the gun. It was expensive and I am keeping it as a collector piece.
Kimber is full size with adjustable sights and other people can shoot it quite well. I cannot yet shoot this pistol as accurately as my HK, or even my Glock. Since this gun should shoot circles around either, it is a source of frustration to say the least.
My brother in law let me shoot his Sig P229 once. After the first shot I noticed the gun put a torque to the side on my wrist. The more I shot it the more it bothered me. I told him about it and after a while it began to bother him too. Follow up shots were not an option for me since could never get past the twisting recoil. Sigs are highly thought of by many and I am sure they are great guns, but I can't shoot one.
Try lots of pistols before you buy one and I believe that you will find one that is a better suited for your shooting style, hand size, intended use, etc. than any of the others.