Getting a new 14 850, need tire help

Just upgraded from my 2005 Sportsman 800 to a 15 Sportsman SP 850. Before I even ride the machine im not happy with the tires, my old sportsman had more lug after 1000 miles than these do new. I like the ITP Blackwater evolutions these seem like a tire that fits my needs of all purpose riding. They only come in 27" tall with that rub? Will that bog the atv down from a stock 26"

Id like to possibly get the 27 x 9 x 14" up front and 27 x 11 x 14" in the rear on STOCK wheels. But would get aftermarket if I have to, just don’t want them sticking out too far past the fenders, just an inch or so is good. Id prefer a 12" rim but heard they wont fit, ill try my RZR 900 XP wheels tomorrow anyway.