I'm looking to buy a computer strictly for the purpose of playing the big piano samples (Garritan, etc.) live and recording. Of course, low low latency is my mantra.

I wonder if, given the current market, I can pick up a top tier pc from a big box store (Best Buy, Future, etc.) at a reduced price that will do the trick?

I'm thinking "out of the box." Ready to go.

Is there anything out there?

And how much?

(I already have a pretty good sound card, but suggestions there too would be welcome.)