You and me both! Right now I am Stax ampless. But so far I've used the 007tii and the SRM1/mk2 with my O2. Of those, I much preferred the 007t. In fact, I quite liked the 007t. I thought it did a nice job with the O2, but an even better job with Lambdas. With the O2, I could tell it was not pushing them hard enough.
At meets, I've heard the O2 out of the Woo GES, and while that was also very nice, it just wasn't powerful enough. Similar to the 007t. Whenever I've heard the O2 out of a KGSS, I end up saying, "oh yeah, THAT's how they're really supposed to sound." Of course, then I heard a BHSE and I realized, "oh..." But one does have to make mortgage payments, right?
Anyway, to end my rambling, I will definitely post my impressions.