12 in. Rims or 14 in. rims

Hello, I'm new to the forum so please bear with me........ I have an 07' Yamaha Grizzly 660. I am looking into putting on Maxxis Bighorn tires in the 26x12 size or the 26x14 size and ITP C-7 rims. I have been compairing tire sizes and weights but haven't been able to find any statistics for rim weights. I have found that the 14 in. tires are lighter than the 12 in.. If the 14 in. rims aren't too much heavier than the 12 in. I will go with the 14 in. set up since the entire package will be lighter and take less power to operate. Plus handleing is supposed to be better. Does anyone out there have a 14 in. set up on there machine and if so how does it handle and have there been any problems?
Any help will be appreciated!!!