I can't find anything on the net that it does perform better, it seems out of stock at newgg but its speeds on writing are alot lower then the 840 evo from there site. I wouldn't buy it personally for performance per dollar. If you want you can always get the 840 pro.
Do you really need more then 16gb of ram? Because if you go to a quad channel motherboard you may want to switch to a Ivy bridge E processor to support the 4 sticks.