Well, today I tried something I had not tried before, using Comply tips, foamies, on the ADDIEMs, and I really like the sound. I have a bunch of P Series tips I got with the Westones and have collected over time, so I jammed those onto the ADDIEM sound tube, and wow, really brings out the bass and feels very comfy. I am using the mediums, which are short, I think. Not even sure what they call them. Anyway, sound very good, and sort of mute the mids and highs, not in a bad way, and bring up the bass. I was listening with the Zune and the T4, bass boost on and gain on. I am going to try the same tips with other DAPs, including the Touch 2G, of course. I believe the T130 Complys, made for the PFEs, would work too. I might have tried those earlier, but didn't like them. They are a little less tapered than the P Series Complys.