Grant,
Remember that if nothing else you can use Boot Camp which is a dual-boot setup and when booted into Windows, it's a Windows machine and Windows is getting 100% of the hardware. So, if it doesn't work well with one of the other methods, you can do that.
No worries! Also, remember that this is technically not emulation. It's running on an Intel box now, and so there's no extra processing required.
All that said, I'd be curious how well that stuff works too. If you want to buy me copies of Windows, Parallels, and the aforementioned software I'd be happy to test it out for you.
I do know that AOPA's RTFP doesn't work under CrossOver (none of the text shows up) and the G430 simulator won't install under CrossOver (says the debugger is enabled and to turn it off and try again). Parallels would certainly work better, but I just can't bring myself to buy a copy of Windows.