I just downsized a rack full of stuff that was all just clutter. I now have three boxes- receiver, blu ray, and server.
I'm trying to keep mine to 2 pieces, but doing blu-ray through an HTP is looking more like a pipe dream.
Really its about how much power you need to get you to a given volume and thats easy to figure out using a
power calculator. This particular calcualtor is for open spaces, so you can add another 5db of headroom to whatever you enter into the Headroom box.
For most people, a 100w receiver is probably enough, but it depends on: how loud you listen, how far from your speakers you sit, what program material you listen to.
For me, in a small room (11x20x8) with reasonably efficient speakers sitting 10' from the speakers, I could listen to classical at 90db average and even with 15db peaks, would use no more than 70w per channel.
Once your room gets big and you start to sit further away, you can run out of power quickly.
If money is not an issue, it never hurts to have extra power on tap, but you may never use it.