I purchased the SPL S1200 and am absolutely loving it! It replaced a Sugden FBA 800. I. used the amps to drive a pair of DeVore Super Nines. Better frequency extension in the highs and lows, more dynamic (micro and macro) and better imaging. Very engaging listening and it runs very cool. More weight and body to instruments as well. Also, extremely quiet and very well made!
The only nit I have to pick is that the on/off rocker switch in the rear of the amp is a bit too close to the IEC inlet and is partially obscured by my after market power cord. Other than that...I can't find anything to criticize.