FPGA
Investment: $2000
FPGA's: 5
Total Mh/s: 950
Monthly power cost at $0.12 for 45W: ~$4
BTC Payout: 0.9762 BTC/Day or ~30 btc/month
USD Payout at $2.70: $81
Monthly net revenue from $2000 investment: $77
Your BTC/month is almost 50% higher than the real earnings at these difficulty levels. They'll fall at the next change, but not enough to earn 30/month at 950 Mh/s. It seems to me that it won't fall this much unless the price falls even more.