Yep X2 get the Foreman wheel set and don't look back.
The only reason I've been able to figure for the 11" rim is that with the 24" tires it gives just a tad more sidewall. But I run 23" tires on 12" rims which is even less sidewall and I have zero issues.
2004 TRX400FA (Rancher 400AT)
MotionPro twist throttle kit
12" handlebar mounted light bar
rear rack wheelchair carrier
Cycle Country 48" plow w/ KFI hybrid mount
Champion 3000 lb winch w/ synthetic rope
23" Titan 489's all around (saving clutch)
2011 Grizzly 450 EPS
Others in the family: '04 TRX250TE, '85 TRX250 Utility (X2), '05 TRX90, '06 TRX500FA, '95 TRX400FW,' 88 TRX125