tickatickatickatickaCLUNKACLUNKtickatick. I like the feel of MX blues, but the sound is a little much for me, even with headphones. There's a reason I swapped out my 1391401 for an MX brown board, and if I were to get a Das I'd probably get a silent version. But then... The only real change from my G80-8200 would be lack of reprogrammable keys, lack of relegendable keys, smaller footprint, USB hub, and it doesn't look like a beige turd. EDIT: Oh, and the Das has an ANSI layout.
Basically I'd be trading features for aesthetics. Ugh, if only my G80 were black. As is the only *really* compelling argument for a Das Silent over my G80 is looks. I'd just spraypaint the keyboard myself, except I'm not sure it wouldn't come out looking like a turd. Also, I don't know how well the different colored keys will look dyed.
But if you like MX blues then I still highly recommend the Das.