Been using middlecoin.com with some GPUs a while ago, he does some amazing trading
At a given point 3 GPUs worth 300 EUR (+- 1.2MH/s) were outperforming 50 GH/s of BTC Asics costing me *a lot* more
This is why I suggested moving the existing GPUs to a switching pool. Profitability has been running 50-100% higher than mining LTC directly for a while now.