There's no question the 650 is a great value and if $400.00 is your upper limit it is probably still the best option. It was my favorite for several years. The reason I think the LCD-2 is an even better value is that it gets you very close to the best out there such as LCD-3, X, etc. but the 650 is not in that league.
Well, of course. LCD-2 is the best value in >$1000 cans. But in <$1000, Sennheiser is king, IMO.