Cool Rig, hope you reach your goal. I just build 2 Rigs with 3*7970 each, mining ltc with scrypt at around 2200 each at their best clocks but right now i have them at 2000 each.
first i read about it on torrentleech where they started accepting donations in btc. Then i got into it for real and bought 8 mining rigs in march when the value got up.