Sorry for delay, have only just seen new posts. I've had 3 Hugo's, each time trying to like and 'get' the fuss. The last one made me realise that for me the bass was not particularly tuneful, and I have now given up trying to like it. I liked the Weiss more, but I had the PS1000 at the time, so would be hard to directly compare.
When I had the Stax, I had a Rega Isis valve plugged into the 007t. The sound was very natural and un fatiguing, but the soundstage was a bit narrow for my liking, but a lot of other strengths. For a long time I thought I had found my perfect headphones with the PS1000, but as soon as I took a flyer on a second pair of HD800s I saw the shortcomings of the Grado. The combination of Mcintosh/HD800 is everything I want in a headphone system.
I was in the process of selling my HD800s to give up on hi fi and buy a motorcycle, but couldn't come to terms with spending all the money, and selling the 800s for a pittance. The MHA now gives me a good reason to keep them.