i use raytheon 6ew7 and sophia princess (though i've been using the 596 alot more) with the T1.
to me with the WA6-SE, it sounds more detailed with a wider soundstage and a bit better imaging vs. the WA2, but loses a bit of warmth and emotion to the sound. i'm extremely happy with either setup, the WA6-SE sounds very pure and very clear to me, the WA2 is more intimate and smooth. of course, everyone's ears are different, what did you find wrong with the WA6-SE (what do you mean by stagnant)
It's not that they sounded horrible out of the wa6se. It was just something about the sound signature that sounded off to me. Now this was just an impression I got from a 30 min session with the T1/Woo with me changing tubes 5 times. Compared to the HP-P1 it seemed like my woo wasn't putting out enough juice which is the same problem I had with the hd800's. the soundstage seemed compressed and there was a slight choppiness that I was experiencing.
I was thinking that my problem was switching from the portable after about 15 hours(3 days) to a tube amp is what threw me off. I'm going to give it another shot before I can say for certain if there's an issue and what it is. I'm in the process of moving so it will be a while before I can unpack my gear. By then I think my HD 650's will sound good to me:D