I'm afraid I have to second Gerry.
IL2 looks much better with the 9700 Pro and is at the same time faster than
with a GF4-4600. And, you can use OpenGL without a problem, it's still
faster and looks better than with the GF4-4600.
As for GPL, I'm using 1280x1024 with 4xAA and 8xAniso. It never leaves the
36fps mark, and there are no graphics errors. That was the same I got with
the GF4. but the Radeon's got a better 3d image quality and much better AA.
However, the Radeon is IMO more difficult to configure than the GF4-4600.
The GF4 on my system was plug and play - plug in, set to max quality, and
have fun.
With the Radeon, I had to battle stutters in online *** with IL2. The
stutters went away with the new Catalyst drivers (Feb. 10), as these are now
so fast in OpenGL that you can use OpenGL with IL2 at high quality settings
and get flawless fps. I still get moderate stutters online in D3D in IL2. It
is also important to clear out the Nvidia drivers well, especially in Win9x
(I did it in Safe Mode, installed Default PCI VGA card drivers for the GF4,
deinstalled Nvidia drivers using Nvidia's own deinstaller, and then check
the Registry for remainders), and to make sure you have nothing running in
the background. Anything running in the background, even if it doesn't do
anything, can lead to stutters.
Achim