*shares a coffee*
I can see how it would be difficult to justify an upgrade for that system. Before Intel dropped the Sandy Bridge bombshell, this forum was pretty much recommending i5 750/760 left right and center for gaming setups. Low cost, easy to OC, quad core, unbeatable for gaming even beyond it's price range. Is yours OC'd?
But yeah, I wouldn't upgrade that either
especially since you already got a current-gen GPU. Unfortunate you grabbed a reference 6950! Those can indeed get quite loud.