Now that I've moved into the new place, I've realized I've forgotten something big.

Music.

In my old apartment, my computer was right smack in the middle of the living area, and close enough to the bedroom that I could blast it and it worked fine.

Now my computer is in an office way on the other side of the apartment away from the bedroom.  Plus, its going on 4 1/2 years old and I'm running out of disk space.

So, I think an upgrade is in order and I'm reaching out for some advice.  I'm willing to go pretty geeky here, especially if it means getting something on the cheap and learning something in the process.

Here's what I want:

I want something fast, with a ton of storage, that I can capture video on and play music.  The music needs to be streamed into 3-4 rooms, but I'd like to be able to choose which rooms.  So, if I'm cooking, no need for it to be on in the bedroom.  I don't need two different streams in two different rooms.  This isn't Webster Hall.

So, advice on a PC (minus a screen... I have a flat screen already) and a wireless speaker setup, as well as a good TV capture card...   Anyone either have ideas, sites to go to, or advice on how to approach my search?

Again...  let me reiterate that I don't want to/can't speak 10K on this.  We're looking to do this on the cheap.