Be sure to consider the newer Gen 4 models with the grip panel replacements. I went with the G-29 and there are aftermarket barrels longer than the 3.78" stock. Although mine has the short barrel it is very accurate for a smaller package. Mine also sports conversion barrels for 40S&W, 357Sig and 9x25Dillon.
You might also consider visiting the new 10mm forum...
http://10mm-firearms.com