I don't think mining is going to shrivel up and die if etherium falls out of favor. There are dozens of coins, some of which are sometimes more profitable than ETH. Such as CFX right now. Today. That's just a myth going around tech journalism circles.
I just picked up a 240 GB Seagate 600 for $130 for Christmas. At least Anand seemed to like it. Not sure why it didn't make this list, but all that counts is it did make it into my laptop. For $130.
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