Id suggest either a HE-500 or better yet,an HE6.
Id say the 500 is smoother sounding,with epic mids and decent bass.Its not easy to drive so you will need a fairly powerful amp.
The HE6 is on a whole other level.Very detailed,great mids and powerful slam.The caveats are its discontinued,so buying used is a must.The other issue is you need an incredibly powerful amp to drive it.Either a dedicated speaker amp,a vintage receiver or a handful of dedicated HP amps will be up to the task.If you cannot afford to drive it properly,dont bother,it sounds like crap under driven.
EDIT:
RE: The Atticus,its an awesome HP,my next HP purchase,but it might be too dark sounding for you.I like warm HPs and my HE6 can be as bright as I can handle,so YMMV.