Were the 2x1 TBs for backup? I'm curious what the third's for. I'm wondering if higher-capacity ones might have made two good enough, and thus eliminated the humming. I do agree with Zelig that, performance-wise, SSDs are pretty much pointless for media, but they do indeed have the nice silence benefit, as well as typically lower power draw, though the lower power draw alone doesn't justify the higher cost in a desktop.
Devil's Canyon is nice, too. Micro Center had a very good deal on those a week or two ago, and I must admit I was tempted - if it hadn't required a mobo upgrade from Sandy Bridge, I might have gone ahead and done it.
Fancy keyboard, too. I read a review of that one on AnandTech. It got mostly positive remarks, except for the difference in material behind the main keyboard and the special keys on the left. Hopefully it works out for you - that's a lot higher end than my $9 Microsoft keyboard!