I'm only making about .05BTC/day with my rig...I just figured that i could make more with Litecoin and hope for the rise. I already have enough BTC so im just trying to branch out.
BTC Mining is only profitable with ASIC and FPGA miners. I would suggest to mine the most profitable scrypt based coin, then convert via trade for LTC and/or BTC. That's how I'm doing it at the moment. Right now, Lotterytickets (TIX), potentially is the best investment, just waiting for it to hit a trade market. I only mine during off peak hours to save on electricity, paying $0.1323 Kw/hr rate.