My partner bought the 1.5 hp Cabela's grinder and it's an awesome machine. It can take the meat about as fast as you want to run it through, and has enough power to grind through the small screen the first time, meaning you don't have to run it through twice. If you have 30 lbs. of scraps to grind, it'll take you longer to clean the machine up when you're done than it will to grind it through the small screen.
NWBuck