Thanks for the info. Do you have any suggested pools or pool types for between the 50-100GH/s setup? I'm planning on building a largish rig soon

...By which you mean "I have a pre-order in on some ASIC miners", right? I mean, you couldn't possibly think it was a good idea to build a large GPU farm... right?
Any of the pools that support GBT will do fine. Take a look at this list here:
https://en.bitcoin.it/wiki/Comparison_of_mining_poolsI'm still weighing up options. It's not that unrealistic is it? 4 newish GPU's per machine, 500MH/s each GPU. You're only taling 10 or 15 machines. Plus it has the benefit of switching to LTC unlike ASIC?