looking at new zero turn mowers. The unit we are looking at comes with a few motor options. The two we are considering are both briggs. 27hp 810cc commercial series with EFI. the second is the 26hp 810cc vanguard motor with a carb. Any body have experience with either of these motors. This will be used purely for residential duty 3 acres once or twice a week. If i could get the vanguard with EFI on this unit it would be a no brainer. The vanguard with carb has an excellent reputation but i cant find anything on the commercial series with EFI. Thoughts, comments? Thanks