It's not the bass (not all of it) that's lacking, it's just the sub-bass, the really deep frequencies. And I'm the one who noticed it, sadly, I can't blame anyone else ;)
But you are right, maybe I'll get over it. I won't be making any impulse buys, don't worry.
Unless someone knows a really good "replacement" (basically a HD650 with added sub-bass), I'll probably just keep saving for a LCD-2. If only I could stop robbing that piggy bank ;D
I returned my DT990's recently because of the sub-bass and lack of impact, but this is also somewhat a open-headphone trait. They did have a lot of well-rounded bass, but having owned D2000's a few years before that I know exactly what i'm missing. My guess is the same would apply with the 650's if they were my ONLY headphones. 650 and 990 are amazing headphones in their own right, I just need a better all-rounder since I only have funds for one nice one at a time.