Another small late complement to this discussion (on an interesting for me topic). I am also using MA5200 with 4 ohm (non-sensible 86db) Thiel CS6 for about a year. The amp never gets hot, it keeps almost cool after hours of working. No sign of the lack of power at all, I rarely raise the volume higher than 40% of the total power. It gives clean warm (tube) sound, no notable distortion at all. (These observations agree with ones from the last post of raydog10 and the earlier posts of zd542.)
With MA5200 experience, now I think solid state amps have one advantage over tube ones (I was always fan of tube amps) - tube ones, despite all the pros produce notably higher distortion.
With MA5200 experience, now I think solid state amps have one advantage over tube ones (I was always fan of tube amps) - tube ones, despite all the pros produce notably higher distortion.