One other option that is not expensive is to use Mye stands with your 20.7s, have you heard of them? www.myesound.com These really do work by making the frame more rigid, I did them for my 3.7s and now the 20.7s.
I agree with you about how revealing the Maggies are, tube rolling can be a lot of fun and allow for nice tuning, I have a MC C1100 that I have added NOS tubs for the preamp side (not the MM/MC tubes) and a tube based DAC (modwright elyse) and both efforts payed off. I prefer tubes in the front end and solid state on the amp side, its hard to get enough power for the Maggies out of a tube amp while the tubes on the front side really sweeten the sound.
Brett
I agree with you about how revealing the Maggies are, tube rolling can be a lot of fun and allow for nice tuning, I have a MC C1100 that I have added NOS tubs for the preamp side (not the MM/MC tubes) and a tube based DAC (modwright elyse) and both efforts payed off. I prefer tubes in the front end and solid state on the amp side, its hard to get enough power for the Maggies out of a tube amp while the tubes on the front side really sweeten the sound.
Brett