Intrepid4,

I agree with Brandon that you don't want to buy something you may not need. If you have already decided that your (likely growing) system will be built around the M-Audio Revo card as pre/pro, then I guess all you need is a power amp, isn't it? (correct me if I am wrong.)

If that's the case, there are some affordable, high-quality power amps available, such as the Outlaw M200 monoblocks.