Thanks for all the reply. We are currently weighting the different options. 6770 seem like a good alternative. I'm wondering if the new BFL "custom ASIC" will really get launched this month and if it will kill GPU mining...
I'm interested to see what option you end up going with. I was looking on alibaba for some other parts myself but not sure who I can trust on there also. Still working on that.
They stop replying to us when we ask for manufacture address
We are still looking for a contact for bulk. Added 500$ bounty to the one who find the best deal. My partner is ready to go to China to meet the seller. I can travel to US/Canada if required.
I would say it's because you need the extra amp for when some appliance reach their peak in electrical consumption. An AC motor will use more energy to start than maintaining speed. Same thing apply to ballast.
I have finalized my course schedule for fall, and I will be taking French. Hopefully I'll like it (or it won't be too bad, at least). Thanks a lot to everyone who replied!