Hey guys, this long time lurker and first time poster needs your help! Thanks to this wonderful forum, especially joker's IEM review thread, I bought myself a pair of Hifiman RE-ZERO IEMs in 2010 and have enjoyed them thoroughly for the past couple years. It's time now to add a second pair of quality IEMs to my collection, I and was hoping you guys could help me find a good one. Here's what I'm looking for (in comparison to the RE-ZEROs):
Comfort - About the same or better. I use the sony hybrid (?) tips and they fit great
Microphonics - Much better. RE-ZEROs aren't very good IMO
Isolation - Better, but it's a 'nice to have'. I travel a lot and my RE-ZEROs do a fairly decent job on airplanes
Cord Build Quality - Looking for a lot of improvement here. RE-ZEROs feel cheaply built and it's amazing they've lasted this long to be honest
Sound signature:
Treble: I like the laid-back, non-bright treble of the RE-ZEROs so I'm looking for something that's not too bright but still has good extension
Mid: Wouldn't mind if the mids are a bit more recessed than my RE-ZEROs, but I love their detail and wouldn't want to miss it
Bass: Looking for a tad more punchier mid-bass, more extension if possible and just a tad more quantity than the RE-ZEROs, which 'decay' way too fast for me. I prefer tightness and clarity more than I do quantity though, so muddy/warm or lots of artificial bass is not what I'm looking for
Instrument separation and soundstage: Looking for an airier IEM with better separation than the RE-ZEROS, which sound a little claustrophobic
Budget: $250 (USD)
Music: Classic Rock about 90% of the time with a little bit of country, blues and hip-hop mixed in
Audio quality (DAC): 320kbps CBR AAC (Iphone 5) / FLAC + 320kbps CBR MP3 (Clip+) - no external amps
Hope that kinda gives you an idea of what I'm looking for, so any recommendations are greatly appreciated! Thanks in advance
PS - I am looking at the DBA-02 MKIIs, RE-272 and RE-262 at this time but I'm not sure if any of these would be a good value upgrade from the RE-ZERO
Comfort - About the same or better. I use the sony hybrid (?) tips and they fit great
Microphonics - Much better. RE-ZEROs aren't very good IMO
Isolation - Better, but it's a 'nice to have'. I travel a lot and my RE-ZEROs do a fairly decent job on airplanes
Cord Build Quality - Looking for a lot of improvement here. RE-ZEROs feel cheaply built and it's amazing they've lasted this long to be honest
Sound signature:
Treble: I like the laid-back, non-bright treble of the RE-ZEROs so I'm looking for something that's not too bright but still has good extension
Mid: Wouldn't mind if the mids are a bit more recessed than my RE-ZEROs, but I love their detail and wouldn't want to miss it
Bass: Looking for a tad more punchier mid-bass, more extension if possible and just a tad more quantity than the RE-ZEROs, which 'decay' way too fast for me. I prefer tightness and clarity more than I do quantity though, so muddy/warm or lots of artificial bass is not what I'm looking for
Instrument separation and soundstage: Looking for an airier IEM with better separation than the RE-ZEROS, which sound a little claustrophobic
Budget: $250 (USD)
Music: Classic Rock about 90% of the time with a little bit of country, blues and hip-hop mixed in
Audio quality (DAC): 320kbps CBR AAC (Iphone 5) / FLAC + 320kbps CBR MP3 (Clip+) - no external amps
Hope that kinda gives you an idea of what I'm looking for, so any recommendations are greatly appreciated! Thanks in advance

PS - I am looking at the DBA-02 MKIIs, RE-272 and RE-262 at this time but I'm not sure if any of these would be a good value upgrade from the RE-ZERO