I have owned a pair of Legacy Focus since Dec.'92 with nary a problem with drivers, cabinets, X-O's, etc. Well made and relatively easy to drive. Owned Legacy-1's and Sig II's prior to that, also trouble-free.
However, I think they are best driven with a SS amp, particularly on the bass sections. I have not tried tube amps. Did use an Eagle 4 on the tops, an Eagle 2 on the bottoms. The Eagle 2 added very little additional, so I drive them with the Eagle 4 alone. However, the Electron Kinetics Eagle amps are well known for their bass output and control.
Have not yet heard the 20/20's, but Bill Dudleston is not one to make frequent or casual updates. More evolutionary rather than revolutionary.
If you are not using a Steradian/Step One processor, consider doing so. At least in my room and system, it made a marked improvement and avoids messing with bass traps and other room treatments that drive our wives crazy. There is a good buy on a Step One on Audiogon now. Not affiliated with that seller.
