HD800 are going to give you your hyper-detail, separation, soundstage... However, you could easily find yourself bored by it since there are tons of people who find the sound to be artificial and unrealistic. Especially if I focus on genres you like. It will also reveal any imperfection within your music or gear (amp, DAC).
You should look into LCD-3 most probably... It's going to give you a good imaging and soundstage along with the best bass and full mids. But still, my recommendation goes with LCD-2 since it's more affordable and you will be given a natural listening experience. It's not a "hifi/technical" sound, it's very realistic. Unlike HD800 (from my experience).
Edited by RustA - 1/12/13 at 10:50pm