Ok, so I understand the relative obsoletion of CPU/GPU mining now. So, what if I just bought one of these beastly 50GH/s ASIC miners? If you were me, would you buy one, and convert the BTC to dollars and make your ROI in xx days?
Buying them isn't the issue, getting them to your doorstep is. The only company that has shipped a 50+ GH/s miner is Avalon, who only takes orders in batches.
GPU mining is not obsolete. Mining with
your GPUs is. You'll need high-end AMD GPUs to be mining efficiently.