Just a quick note that the MSI 7950 GPU is back in stock at Amazon after more than a week of unavailability, although it looks like they only have 19 of them. This is my top choice for mining, and the one that is featured in my guides.
I know some of you have been waiting for them to come back into stock, so grab them while you can!
Edit 4/28: … and they’re gone. Amazon expects more availability on May 1.