I am going to be building a PC specifically for use in OSX to replace my mac mini. For now, I won't be installing windows, and have no need to play any games, so would an Nvidia GeForce 7300 GS or GT (256MB) be OK for just OSX, as long as I'm not running any 3D applications?

My mac Mini currently has an intel 950, and it works fine for the graphical needs that I need.

Would there be any performance differences in OSX (QE/CI) AT ALL between an extremely budget card like the 7300gt/gs and something higher-end like a Geforce 8800GT? Or should the cheaper ($30!) card suit me just fine?