MF, yep, i wish I had a normal bias amp to give them a go. A lot of what I am hearing may just be a lack of control. I need to either get a listen to them on a normal biased amp, which I don't have, or take the leap of faith that they will be OK at low volume on a pro-amp. Heck, if there is enough air gap and they can run safely on pro-bias that may have a really big impact.
I spent a all of last week listening to the 950 at work. They are not without their flaws, but at this moment I'd recommend them over the Kingsound as well.
STAX entry level 2170 is available for under $600 and would be hard to overlook. Again, the Lambda sound, especially on the entry level is not going to be for everyone either.