Working on a project

So when I get my Army bonus I’m getting a 1TB Time Capsule, 160GB Apple TV, and a 3.02 Ghz iMac (4GB RAM, 750GB HDD)… BUT, this isn’t going to be my DVDFab rig.

My current rig (abit AN9 32X, Athlon 64 X2 5200+, 256MB Geforce 7600 GT, 2GB DDR2 800, 250GB HDD, 18x Optiarc, 8x HP, Raidmax Smilodon Case) runs my stuff fine, but I usually give my wife my older rigs and I’m going to make a dedicated copying machine and using it for some gaming (Guild Wars).

I was just wondering, I want to convert movies in less than 30 minutes flat for my Apple TV when I get it, how fast would I need to go to achieve this? I’m also adding a hot-swap tray for backups (you can NEVER be too safe!)