Don't be offence, but I don't think that you will able to get any profit with your graphic card now...
ASIC is coming, ether buy it or forget about your small farm.
If you are still sure, try several pools to be sure. Choose from those pools, what take smallest fee.
1. We will talk about ASIC when we see one...
2. Fee is not everything. Most of pools is keeping transaction fees from block. P2pool is splitting full block value (block reward + tx fees) and most of nodes have 0.5% or even 0% fee.