MB with good linux driver support

Hello,
I am planning to build a desktop, with moderate usage. No high end graphics or performance requirement, but browsing, compiling programs etc. Plan to use Debian Squeeze. Can you help me to find a good motherboard, with linux support. To save cost, i guess the video, audio and n/w card may be integrated, hence good support for linux. The budget is around $100.

1. Processor
AMD Phenom II X2 555 Black Edition Callisto 3.2GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Desktop Processor - C3 Revision HDZ555WFGMBOX
or
AMD Athlon II X4 640 Propus 3.0GHz 4 x 512KB L2 Cache Socket AM3 95W Quad-Core Desktop Processor ADX640WFGMBOX

If you have a better suggestion for processor, please let me know.

Thanks in advance...
Bsr