HVC seems the best by now for 750's owners.
As I have only one GPU, and wants to try a lot of options, couldn't stick with one coin yet... =/
By now I'm giving a chance to H2O coin. At least 1000 coins a day.
In a few days I'll receive my March's electricity bill and will be able to evaluate if I shall proceed to build a mining rig (planned 4 750's one) or leave cryptocurrencies behind.
By the way, here in Brazil is really hard to find some of the rig needed pieces cheap, especially the 750's. So, I cannot afford to make a mistake buying wrong "options".
Now the best option I have is this ZOTAC
I read some good reports from owners. Even don't having the 6 pin power connector, do you guys think its a good option for a 4 GPU rig?