We reviewed the ia11 in issue 17 and loved it. Actually gave it one of our exceptional value awards
in 2008...
The ia21 is more of the same, a few more watts and more adjustable for tube type.
Both amplifiers have a bit more modern sound than their Prima Luna cousins. If you
want more of a vintage McIntosh or vintage CJ, the Prima Luna is for you, if you'd like
more of a current Audio Research sound, then the Mystere will be the winner.
Built like a tank, great sound and reasonably priced too....