Why take the risk of using another (unstable) crypto currency? Chances are that you can sell your GPUs and buy less power hungry FPGA/ASIC solutions (like the japaleno). Unless your using really old videocards selling those should cover the cost of the new hardware, while you'll save on power consumption for future mining. The only issue with FPGA/ASIC solutions is that outside of the Bitcoin mining business it has very few applications, so selling it could be an issue if the Bitcoin collapses. On the other hand, value actually increases when you sell them in an active Bitcoin economy due to the current waiting time of 2+ months...