Everyone here says MC600 trumps MC200 as a Sooloos endpoint, but I haven't heard an MC600.

My experience is, however, that MC200 analogue out into my Quad preamp and Meridian M60 analogue actives is very good - the MC200 makes the preamp-speaker combination sound better than it ever has done. It also sounds better than an SB3 into the same system.

Compared to a 506.24? Why not get a home demo of an MC200?

What will you be driving with it? By the way if you put your system in your signature people will be better able to give advice.

MC200, Twinstore, 808v6/ID41 -> DSP8000SE (+ SB Touch, Sony BDP-3300, SKYHD, legacy cassette player)
2nd system: MC200 analogue out, Linn LP12, SB3 -> Quad 34 -> M60 rosewood
F80 (Rubino Micallizzato)
F80 (Rosso Corsa)