The last ones I bought from my dealer 2 years ago (E4's) were under $300 for both front and rear. They only charged me $25 a tire for mounting since I took the wheels in.. No extra for balance, reused my weights.
I always buy mine from the dealer. No problem with warranty then. Buy them onilne and pay for return shipping and wait weeks for replacements. That happened to one of the guys I ride with. Plus he had to pay for dismount and remount again. Ended up costing more than buying them at the dealer.