i recently bought a Intel DP45SG with 2x2GB Crucial Ballistix Tracer CL6 DDR3 and a Intel Core2Quad Q9400 CPU.
I also read a lot of bad things about the DP45SG but if i'm honest the board is running quite well from since the beginning.
The stability is very good and I have no problems at all with sudden reeboots or something like that. You only have to pay attention with the Ram Timings
because the board is a little bit fussy about the adjusted frequency and the clock settings.
Okay you might get more value for the same price if you would buy a mainboard from Gigabyte or Asus but I have to say i'm really satisfied with my Intel one. Only sad point is that the Desktop Control Center still doesn't work under Windows 7 RC but Intel promised to fix that till the release in october.
Until now I can fully recommend the mobo. Your configuration should work fine if you're not afraid to try several Ram settings.