If the M9 fits you, but seems a touch big and the ergonomics slightly off (grip is a little too fat and the slide safety annoys you), the HK45 should feel amazing in your hands. Same with the P226 E2 (my hands and pistol preference are the same as yours, these are my top 3 as well). Both the HK45 and P226 have metal body kits fairly readily available, although the HK45 might have slightly less selection (although our dollar still sucks balls to do pistol builds).
One step at a time
. Take a bite, chew, and swallow instead of trying to stuff the whole party sized pizza in your mouth at once! And don't forget the gear that goes along with the guns :P