I thought I'd pop in with some news:
Got the Fanatec all set up, and tried it with both FM6 and AC last night. I get the hype about the FFB and general feel with the wheel, I do. Had a blast with a few different cars, and it felt wholly natural. The only issue for me was the wheel deciding to see-saw if I took my hands off, which I imagine is something I can fix once I dive into the myriad options available, either in-game or on the wheel itself. So that's all fine and good.
This has made me realize how utterly terrible I am at heel-toeing, though. Basic clutch work is all fine and good, but that? Not a chance.
I'm going to try PCARS tonight (after it finishes updating, which will take approximately forever).