Hi Cap36
Am a long time Rotel fan and so have recently upgraded my previous kit to an RA-11 (based on pricing brackets of the range). I auditioned the -10 & -11 side by side and whilst I much agree with the WHF review that the -10 is an exceptional piece of kit for the money especially when it comes to the sound and musicality, and most probably has a slight edge over that of the -11, it was not enough to make me eschew the features that the -11 possesess over the -10; onbaord DAC, digital input, etc. Also, if I am truthful I found the -10 a little too musical (I know that might sound silly to some) for my taste; I prefer a little more control and clinicality (if that is the right term?) to my music presentation, and this is where IMHO the -11 is better. I also prefer the styling of the -11 over the -10. Again, personal choice.
However that said one must do the audition for oneself...on the basis of the above. And both are great amps and well worth buying each in their own right. If you prefer a warmer sound then look elsewhere.
RA-12, not listened to as it was not in my price range and I do not need the 60w on off as the 40w that both the -10 & -11 have is fine for my setup. But from what I have heard the -11 & -12 sound very similar (spec-wise they look almost identical other than the wattage).
Hope that helps?
Balders