What kind of a rig can run IL-2 with full details and high fps?

[whatnot]

I have a decent rig with Quad Core Q6600, Geforce GTX 295 and 4Gigs or RAM. Still when I max out the graphics and fly low over Berlin for example I get pretty low FPS.

Since I assume that the GFX card isn't the bottleneck I assume my CPU is not up to the task. But after checking a few cpu charts I see that my CPU is not more than about 20-30% slower than the best Core i7's so I wonder would that make much of a difference in IL2 FPS.

So any thoughts on what would need to be changed / tuned to get my FPS up or is there some IL2 limitation on taking use of all the cores or something?

Tnx!