yea there about the same but i figured that the gtx460s are roughly 50 bucks cheaper then a 480.
EDIT: so after looking at newegg the cheapest sli evga's are equal to the price of a msi lighting gtx480.
According to my calculations an upgrade to a dual 460 system will, in the long run, cost me about 90 bucks.
EDIT: what does it mean when 1 PCIE is at x16 an the other PCIE is at 4x??