They will still rebuild them, I started with Maggie MGIIb's and upgraded to the IIIas after awhile. I have used Audio Research M100 monoblock tubes but now use the Audio Research D400mk2 and support the maggies on the low end with a pair of velodyne 12 in. powered subs. Have kept my Audio Research SP9 mk 3 too. Still have the IIbs and they said they would rebuild them too.
Last year I pondered the 20.1s and gave them a good listen, and they did sound better in several ways than my set-up, but to me, and risking the wrath of some, it was not an HUGE improvement. Many speakers do some things better than the IIIa but for me anyway, it creates a very musical experience and except for getting a marantz 11s1 sacd player, I have quit upgrading and just keep investing in music
Last year I pondered the 20.1s and gave them a good listen, and they did sound better in several ways than my set-up, but to me, and risking the wrath of some, it was not an HUGE improvement. Many speakers do some things better than the IIIa but for me anyway, it creates a very musical experience and except for getting a marantz 11s1 sacd player, I have quit upgrading and just keep investing in music