Just a follow up.
Got the Matrix GT1000FX 2U in the mail and installed. HUGE difference in sound. I know its fairly obvious, since I'm going from outboard Power Amp coloring to relying solely on the Axe. But the cleanliness of the sound is extremely obvious. The weight difference with removing it, along with the triaxis, was through the roof. Let me say this though, to be fair with the 2:90... I think that my 2:90 was having issues prior and cannot say anything badly or ill against it as a power amp line. I cant make a negative comparison because I don't think that the 2:90 was performing at its peak. With that, if there is any blame to be made...it should be against me, the owner. I suspected this before, but I didn't want to put the cash towards sending it in to be serviced if there was a possibility that I was going to go to a SS power amp. So, ad nasum, I still love that power amp.
But damn....that Matrix sounds good. Going to get the Triaxis/2:90 duo serviced and mothballed for the time being. Time capsule it and let the great grand kids make some money off of it.