That setup should do just fine. You may find that you will need more than 1024 mb of ram, or perhaps not. I'm using 1024 in my Athlon setup, and so far so good.

The main concerns with soundcards are latency, noise floor specs, the type of drivers, ( ASIO is preferred ) and sample / bit rates. 24 / 96 is generally the minimum standard that an average to lower end, but usable card made for audio production should have.

AJ