@mahgister,
I use a Sanui Six receiver to power a pair of Stax SR-Lamdas (manufactured in 1978!) that have been my daily drivers for over four decades. They are easily the longest lasting gear in my system and I live in constant fear of them dying. I've tried a lot of headphones over the years but I have yet to find anything that gives me the same sense of space, detail and (realistic, not bombastic) bass response. I can appreciate your love of a quality vintage amp, even though I'm not using AKGs.