Was going to ask a similar question... Have an x2 3800+ at 2.6ghz... Went from ATI1800 XT setup to an nvidia 8800 GT and found some improvement, but can't really drive games with much eye candy turned on with my new 1900 x 1200 monitor... I thought the gfx card upgrade would help me hold out until the q9450 processors start to ship, but it's killing me having to play games dumbed down... Glad to hear the CPU upgrade will help me out...
Just have to figure out what new MB to get to go with my q9450... keep options open for nvidia SLI? Anyone's thoughts?