Your fans on your heatsink aren't correct.
You must add a push fan to the bottom of your heatsink, and a pull one at the top.
THIS is why your temps are high.
It looks like you're using your Noctua fans to exhaust the case?
http://www.pcworld.com/businesscenter/article/245486/details_leaked_on_intel_ivy_bridge_processors.html
I also seem to remember something about quad channel ram...
Prices are still high because of demand.
Many people are upgrading their Duel Core 775 chips, to the Quads (typically Q9XXX's).
A Q9550/Q9650 is a great chip. Not only is it a true 4 core (like the i5 2500), it overclocks well and is close to the i5's in performance. You'd be hard pressed to...