So I have settled on what upgrades I am going to get. Gonna go with a Gigabyte EVO DDR3 board. GSkill DDR3, and a second Saphire HD 4870 for XFire.
I'm going to stick with my DK and my AMD 550. Most games, at least the ones I play, are not threaded for quad cores. So higher clock speeds provide a greater benefit. I am not convinced I have reached my OC wall with this cpu. I think my current DD2 is limiting me. CPU temps are the main reason I think this. Under full load, my cpu never gets hotter then 35c. Thats with the fans throttled down by the mobo. Now for a 1ghz OC that is a phenomenal temp. So realistically, with DDR3, I am hoping 4.3 ghz is obtainable. Also, I am gonna put a slipstream on the window and a Thermalright 140mm fan in the 5.25 bay. This should allow me to eliminate the need for a fan controller. I'm also gonna install a new CPU heatsink mount so I can turn my DK to a standard orientation.