So far the Grados are the best headphones I've owned. The foam pads don't annoy me, sound great and play nicely with my glasses.
Less can be said for my previous Sennheiser 525s which broke at the headband despite being handled delicately [managed to get a replacement headband and sell the lot off] and somehow rubbed uncomfortable on one specific part of the cartilage on my outer ear.
Anyway, I only use the Grados in my room (may push to listening when cooking), so there's no problem with sound leakage and for portable use, since my small ear canals don't like ear buds, I've got my Sennhesier PMX60s, which are the behind the neck style so I can where my hat. I'm not trying to block the world out, just drown out the traffic a bit and still be aware enough I don't get run over. Maybe at some point I can look into proper IEMs...
I'm an electronics engineer by trade, so the two in one box mod is easy and I can always recase it or change the sockets if I need to hook it up to my hifi when that gets used again. If the ODAC works with my current (or future phone), that's a bonus, but the O2+DAC would be primarily for room use and maybe with the laptop when I'm visiting friends or family.
Ironically, what started me getting onto this forum was trying to find a DAP in the first place which would replace my phone where the headphone socket was starting to break, as it's the only source I have which can drive the aux in on my car stereo.
In the end I'm debating whether the Fiio X3s shortfalls of limited space, lack of playlist support and high cost, but better sound quality and ability to drive any better headstones in future, outweigh the convenience of space and price than say a Rockboxed Ipod Classic 5G. :)
Edited by locksbury - 1/19/14 at 4:52am