Rim and tire size help.

So i hate the look of my stock rzr 900 rims im leaning on something nice but affordable what is the best rim size and best tire i can get for desert riding?
I like the beadlock method wheels but am not sure what tire size to get or tire brand ive heard good things about kanati mongrels then ive heard the side wall is bad? Ive heard that the maxxis big horns are the best tire period as well? Can someone please tell me the lug patter,best tire size and tire i can get? Thanks
Im staying away from then 14" because they seen super heavy compared to what stock is. Thanks again for any input and recommendations oh my rzr is 2012 xp