This would take approximately 4 months to pay off at current BTC rate
Yeh, it's paid itself off a couple times for me. I really want to play around with litecoin mining but I can't seem to get all 4 running under xubuntu 12.04 with cgminer and bfgminer.
I had the same issue on my 4 card rigs. Finally bit the bullet and put win7 on a partition and there they work. You're linux isn't right dude =P