I would greatly advise against the Beats Solo HD, as those headphones have the weakest build quality I have ever seen in a headphone. I hear stories about people breaking them all the time. That, and they have no midrange really, just bass.
Sennheisers are not good for bass quantity at all, same with AKG. I realized that after being bored with my HD280 due to its low amount of bass, even tack modded.
If you can stand them not being easily portable, the Beyerdynamic DT770 Pro-80 is an excellent basshead headphone. It has lots of bass impact and quantity, but doesn't overpower the mids so much, so they are still good for other genres like metal. Later on, you can upgrade to leather pads from beyerdynamic if you want even more bass, like I did. They sell for $150-$200. I got mine used for $100, but I had to fix it up a bit.
If you don't want a bass monster, the Audio-Technica ATH-M50 is a great alternative. It has a very good low end, with impact and quantity, but doesn't overshadow the midrange. This makes it versatile for anything. They are also built extremely well. They sell for like $150. Try to find the straight cable version, the ATH-M50S, if you can, but the coiled cable isn't really a problem. Nothing like the freakish HD280 coiled cable.
Other alternatives such as the M-Audio Q40, XB series and whatnot exist. But I own the DT770 Pro-80, and have borrowed an ATH-M50 for over a week, so I know what I'm talking about with these headphones.
TL, DR:
Crazy Bass - DT770 Pro-80
Good Bass - ATH-M50
No Sennheisers, AKG or Beats Solo.