I have a KE USP-9 and it is my favorite handgun. I bought it new. I recently decided to get rid of my extra hand guns and get another USP-9. I'll check out the P-30 but I don't practice enough to be instinctive on more then one, although the P30 may be close enough... Otherwise here is my question: I am considering used if a safe queen etc. I know there were several changes along the way. Is there a vintage that is more or less desirable?