What? Another dicussion on bass quantity vs quality?
For me, I really love loads of bass. It's been like this for quite a while now. Still, there are times when you appreciate having less bass and more clarity, less mid-range bleed, less "thump thump woof woof". I think in the end, unless you have found that one dream headphone of yours, it is nice to maintain a collection of various types of cans. Some of my basshead cans have loads of bass, but others really border on the "basshead" definition.
For example, a headphone like the XB500 and Crossfade LP are really good for days when you want just BASS. Amp it with EQ or an E11 for a great head massage experience. For other time, a can like the PRO700MK2 or HFI 580 would suffice - ample bass quantity without forgetting about the rest of the sound spectrum.
I like choice, so I usually pick a headphone based on my sound preference for the day/time. My bag has at least 3 headphones/IEMs at any one time.
I was disappointed with my HE-500's bass response at first. It wasn't until I added a big EQ bump in sub bass and a speaker amp that I was able to get that pounding bass I enjoy out of them.
LCD-2 rock for flat bass.
The Beats Pro and Beats Mixr are actually pretty good basshead cans. If you halve the price, they'll be solid/good recommendations. If you halve the price, and change the brand, they'll be top-notch choices.