Re: 6200 Performance
I installed a evga GeForce 6200 in the computer I'm building my mom. It can run Aero with transparency and everything but don't plan on playing Crysis on it.
You might want to make sure neither of yours have Turbo Cache because the achieve the full memory it takes off your system memory.
For Linux this card will be great, I can run that on my GeForce FX5200.