Money isn't a problem, I got almost $30k, however my goal was to just get 1 ghash/s for around $500. Would it be better to buy the most expensive cards possible? I thought gpu mining was almost obsolete and it wouldn't be wise to invest so much in it. I just wanted to spend a few hundreds bucks and mine for fun instead of having my laptop that I use for school run 24/7 mining 30 mhash/s.