I really don't much mind the "funky" bass, as you refer to it. I guess you and I just have different preferences when it comes to sound-signature. So personally, you're saying you like the PSB M4U1 a good deal more than the Sony MDR-1A, I assume? I can understand your reasoning completely. I just have a number of pros-and-cons I am trying to weigh regarding each of the two pairs of cans. For one thing, I couldn't really see myself ever using the M4U1 as a portable. . .it's just too big and clunky, and looks somewhat ridiculous, haha. Secondly, I have a few build-quality and wiring/reliability concerns that based on a large amount of research I know can potentially arise with the M4U1, but do not seem to occur at all with the Sonys. . .and no, I'm not referring to the issue of teh plastic cracking, I know that they fixed that after the first production run. I'm referring to the flimsy screws in the folding hinges, as well as the wiring between the drivers. I am quite honestly wary of ANY headphones with such folding hinges. . .they add just one further reliability/build concern that can become an issue in the longterm. And since overall I don't MIND the sound-sig of the Sonys (although yes, I do PREFER the signature of hte M4U1, how could I not, haha), I am leaning towards the Sonys, at the moment. If I had my choice, and money was no object, I'd get both. . .the M4U1 for home use, and the Sonys for portable use.