Well, I got my RE2s about a week ago. I really like them. To qualify all of this, this is my first set of decent IEMs. I have several sets of cheapies. I also have a few sets of decent headphones (Senn hd 650 with Equinox and SR 325i). I have a Tomahawk and mini 3 amps plus a few others. I tried the RE2s right out of my Meizu M6 and with the two amps mentioned as well as the PA2V2. If a person thinks that the RE2s lack bass, the PA2V2 is a good compliment to them (and it is cheap). While I think they do sound a bit better amplified, the M6 drove them well as did my Sony SRF-59 (modded). The RE2s are very pleasant to listen to for long periods. Some have mentioned that they sound something like Grados. I think the upper mid range is smoother and far less "in your face". The bass while a bit lean is good and extended. On material where there is a lot of bass content the IEMs sound nice and full. I did tweak the equalizer for the bottom two octaves up a couple of DB. I used the RE2s on a couple of occasions for four to five hours at a stretch. With either the two flange silicon tips or the Complys it was easy to forget they were in my ears. I, as others have said, sure would appreciate a cord clip though. If anyone has a suggestion for a source for a nice clip, please let me know.
Anyway, for the price of $80 I think these things are a killer deal. I would recommend them to anyone good quality IEms under $100.
Phil