I use the t70p with ODAC and the O2 (battery driver version) amp. It is well-known to handle low-impedance headphones admirably. With this setup I feel I get a very involving listening experience with classics as well as metal :) Lacks nothing to me. Instrumentation placements are well defined and vocals are very smooth and enticing.
I have had the t70p only some days now, but the sound really gets more and more inviting. "Brain burn-in" I guess.
I have an E10 as well, which I compared with and quickly put aside. The bass was weak and bloated and the vocie and treble seems shrieky. It must have been impedance shifting in the E10 amp I guess.
Anyway, I am really happy with these phones. I recommend them strongly!