I get good frame rates on Operation Flashpoint.
I have WWIIOL, but it's unplayable. And will be for another 6 months, til I get a 1.3ghz, 512+mb machine.
I didn't like the fm very much, seemed quite gamey and I dinnae like the e retention.
Tanking and being an infantryman was very amusing.
It's very amusing in OF too

.
When there's a huge increase in required hardware, I expect a reward of some kind. With WWIIOL, I can feel and *tell* that the poor sods doing the coding have been working 18 hour days, doing their best.
Knowing that the stupid management won't give them the time to do it the way they want. As a consequence, they've been unable to optimize their alogrithms. This is not uncommon in the business I hear; hell, we did that with our project when time was running out. A few bad algorithms can really slow a computer down.
Anyhow, I don't feel I get the reward in terms of better graphics, higher fidelity fm etc. what I get is a massively multiplayer game set in WWII. I'm ready to pay for that, too, but I just have to have the money first.
With OF, AH and soon IL-2 and TK (which will kick arse), I can live without WWIIOL for a while.