The 20/20 is great, the 2:90 will blow your mind.
I upgraded from the 20/20 and I had no idea how alive my cab could sound. I am running a huge old Peavey cab with 4 G12-85 Celestions that I didn't know how much more punch they could deliver, but I was under driving them with the 20/20. The second I plugged in the 2:90 and hooked it all up, I about _______ fill in the blank...
I also got a huge deal on the 2:90 so it was an easy upgrade, but none the less, had I known sooner what the difference was, I would have upgraded sooner and spent more.
That's me, though.
I have some clips that feature the 20/20 on our myspace page.
www.myspace.com/chaometry
We're recording some new stuff with the triaxis-2:90 combo when I get back from Colorado. I will be happy to share that when I can.
The one difference is live volume levels. We rehearse in a decent sized space and of course I'm competing with the drums, bass and keys, so the 2:90 handles the volume effortlessly.