This kit generally plays very well with DFI. I own 4 modules and they are fantastic. If money at all enters you decision-making process, its hard to beat this kit.
G.Skill PC4000 2x1gb kit = $189.99 plus shipping
G.Skill's product page for this kit ( Model #: F1-4000USU2-2GBHZ )
Page posted by G.Skill Tech at XS (includes results and some benches, your questions should be answered by G.Skill employee)
Total price is: $189.99 + $4.81shipping = $194.80
If any mod should happen to see this, my thread title could use a price upgrade...