I mine with 2 nVidia GPUs, I am in it for the long run - I expect "final" price at about 50 000 USD per BTC. So I don't care if I am not profitable right away, I can wait for it. Bitcoins are my pension fund :-) Btw I started mining in june 2011, till now I have 12,5 BTC
i will be billionaire by this logic , if you said 500 $ or even 1000 $ i would some how think ok maybe it is possible in the next few years, but 50,000 come on LOL