I've got an opportunity to trade one of my seldom-used, dust-collecting handguns on an HK USP Compact in .357 Sig...I've got several questions. First, I shot an older, full-sized HK USP in .40 S&W several years ago, just after they came out...it seemed rather pleasant to fire...not as much "Buck 'n' snort" as my aluminum-framed Smith .40...do the Compacts "behave" the same way? How 'bout in .357 SIG? Almost EVERY fixed-sight handgun I pick up seems to want to shoot low for me...are different height front and rear sights readily available from HK? Anything else I need to know or consider? Thanks....mikey357