The IF review is a good read. I'm tempted to get the UHA-6Smk.2 but it won't be for iems or a truly portable rig. Just a transportable (around the house) alternative to my desktop rig for the HD800/LCD-2 for when I want to listen to these cans from my MBP and not be tethered to my desk. Should I bother with this thing, and what opamps would be best to obtain for these headphones?
Well the op amps are socketed which means you can roll op amps. Considering you're a HD800 and LCD2 owner you probably have the funds to go for the gusto. Why not just order all the different op amps from Leckerton and enjoy the experimentation. If that doesn't appeal to you then email Leckerton the same message you posted here and ask what he suggests.