So I'm looking for my first nice over-ears headphone; I have Senn CX 400-iis and I love the sound, but I'm ready to step up to over-ear quality. I listen to a few different styles of music, but mostly ambient, trip-hop, classical, dubstep, reggae, and some rap. I would prefer something portable, but honestly my priority is sound. I stumbled on the HD 555s at local FYE, and have found a much better price from someone here who has done the 595 mod. However I've seen in a lot of reviews that they lack bass; I like to have bass with an impact, not overpowering but resonating, but that bass that you can feel, and I'm worried that these won't deliver. I'm looking at the Sennheiser website and the description of the HD 428s stands out to me. I've also looked at the HD 202s, but see that some say they lack bass as well. I'm also slightly worried by the price that they won't deliver the overall quality and clarity I am looking for. Other sets I've considered are the Bose around ears (but I'd rather not cop out and overpay just for the brand), Grado SR80, and the Phiaton MS 400s. My preferred sound style is somewhat aggressive but with a bit of warmth, bright, definitely nothing tinny at all; I'd like to have recognizable soundstage but nothing too epic. What are people's experiences with these sets? Feel free to recommend others.