I did not vote since, to be practical you'd need a few standard handgun designs to start out with; Glock 17/22, 1911A1 full size, Beretta M9/92FS etc...
I'd add that Blue Guns or Blackhawk training models may work, but I'd pay the extra $, and buy a few ASP models(red guns) that are the exact same weight as a fully loaded handgun.
www.Galls.com sells a few models; Glock 17 9mm, Beretta 92F, 1911A1 .45acp, SIG Sauer.
CF