Hmmm...if its more midrange detail you're after, the UE900 might be a step in the right direction. They sound a little unnatural with acoustic though.
If isolation isn't a priority, I'd say look at the EX1000. If it is, GR07 is a safe bet, they do require a long burn in though from what I've heard from those who bought them new (I've only demoed). The Heir and Noble triple drivers might be worth a look too, although I can't say I've heard them.
How do you feel about the TF10's bass?
Are you using UE900 with your Nexus 5? N5 for UE900 is a terrible source, I have to have it at max to get a decent sound, while my work-iphone when using spotify gives me great sound and detail and get that bass while with the N5 I don't. However, my Klipsch S4i are decent with the N5 not the UE900.