I'll recommend HD 800 with Little dot MK VI+, many guys told is better than the Woo Audio W22, tested Side by Side, the cons is that you can't plug in a low impedance dynamic headphones for the buzz noisy and you should get better tubes if you want get the best experience. But i think that you should get a great Dac too, if you want buy those headphones.
Depend what kind of music do u want listen, but if you want listen all kind of music i recommend T1 cuz the Bass is considerely better than HD800, but there is a self-contradiction, i have the both headphones ok? but when i listen music like Joe Satriani, Buckethead, Metallica, Iron Maiden, Megadeth, etc ... i prefer a lot T1 but is different story when you listen a unique power metal band like Rhapsody of fire, why they are unique ? Everytime that make a new album they contract of large Orchesta and Choir so you need a huge soundstage like hd800 or mid transparency when you listen Epica. there is a link that show the behind scene of a album of Rhapsody of Fire.
https://www.youtube.com/watch?v=h2_dhiyHA7o&list=RDh2_dhiyHA7o#t=0
Beyer T1 has better detail than HD800 if it's well amped.