Hey, I'm a very long-time lurker, first time poster hoping to steer the OP away from some pain down the road. There's no denying that the AH-D1100s are just about the most bass-heavy headphones in their price range, but PLEASE save yourself the money from buying them. They were my first step into the wallet-draining higher-end audio world, and an unfortunate misstep at that.
Regardless of how good or bad people will tell you they sound, there is a very well-documented case of the cheap plastic arm developing cracks and eventually snapping, just from normal use. As they were my first expensive-ish purchase, I pampered them and never had any accidents with them, and they still broke on me right on top of my head (as I was sitting still, no less). If you head on over to amazon and read the reviews there, you will find many people like me who have had this exact same problem.
If low-budget bass is your top priority, I would recommend trying out a pair of sony XB500s. I owned a pair of those for years before donating them to a friend, as my taste in sound evolved to the point where I was looking for something else. I remember them fondly. They were very sturdy, and the huge, cushiony earpads were some of the comfiest of any headphone I've ever owned. The larger drivers are definitely capable of rumbling out some really hefty bass, but don't expect to be impressed by the mids and highs. They're also quite a bit less expensive than the M50s and 1100s.
Hope that helped :o
Edited by Caessa - 1/15/13 at 6:08pm