I've mixed and matched my Mc gear with my Klipschorns (and with other heritage speakers). Currently running MC30's on my horns, but if you were going to pick a 2 channel SS amp, I'd go with the MC2105. Plenty of power, easily serviceable, sounds great, and classic looks.
In additional to my tubes, I've hooked up an Mc250, 2505, and a 2105. At low listening levels the differences are slight. If you want to crank it, or really do some detailed listening on a good turntable, I'd go with the 2105 for a SS choice.