I'd have to say the G27...
Most of these folks that buy the G30 and G36, then load them with fast 165's.......
Duh!
You can get fast, if not faster 165's in the .40 cal G27, in a much smaller package.
The only reason I would go with a .45 Glock would be if I primarily wanted to shoot heavy 230 Grainers......which like I said above, most G30/36 owners don't carry..
Believe me, the Winchester 165 Ranger SXT's (Talons) that I carry, are hard hitters!!
Border Patrol issues the Remington 155 JHP, and this stuff is hot too.... try it, you'll see what I mean..