400R - Does anything the 500 can, for cheaper. It's replaced the Antec 900 in my $1200-$1500 builds.
Actually, the 500R doesn't make a whole lotta sense to me. Personally, I'm torn between the 400R or spending a bit extra for the Obsidian 650D, which is 162 odd on Amazon the last time I checked.
If you want to splurge, might as well go the whole hog and get the 650D, I say :P
EDIT: Didn't notice Whyme's post. That's why, if you truly want it, the 650D is (to me), the best mid sizer in town today, and that too by some distance. Either way, don't think you're gonna be dissatisfied, I don't think.