I'm interested, but not at that price. Some of these headphones went on avforums in Feb for £27.50 inc post, and I missed some on ebay for £27 posted last month. If you can do that kind of price you have a deal.
Off-topic, but I'm just reading an article that made me think of this. Especially this bit: http://www.innerfidelity.com/content/musings-headphone-amplifier-output-impedance This confirms my thoughts on the HD800, that it loves very-low output impedance amps to get the most driver control. If I were you I'd be using the lowest output impedance mode on the amp and bumping the LF up a bit with a good EQ.
Interesting. A damping factor of 1.09 is miserably low. I wonder if it sounds better to you because the flabbyness of the amp cancels out the precision of the headphones Nice craftsmanship all the same.
The article is a getting on a bit now but I thought it was worth sharing again.
Convincing arguments for 44.1/16 being sufficient---even optimal---for playback.
AMB says one S22 per B22 board for speakers (regardless of 2 or 4 board). Deviate from that and you'll be deviating from the official word. Anyway, 50 W into 8 ohms would imply a current of over 6 A, which is going to dissipate far too much heat in the MOSFETs for the stock heatsinks. You should make a thread on the AMB forum and TK will go over the calculations with you. Offboard heatsinks will be needed, negating some of the gains from cheaping out on the PS.
DefQon is wrong in his assumption. Assuming you live somewhere with a 115 V mains supply you want to wire the primaries in parallel (BLU and VIO live, GRY and BRN neutral). Not 100% sure on the secondaries ...