I've had this amp for about 15 years, and have gone back and forth between it and a Fender ProSonic (which I also love). I've got other amps too -- I've got a great Mesa/Boogie Studio Preamp that I run through an old Crown DC300 power amp to run a pair of 4x12 cabs, and it kicks ass.
But the Cyber-Twin is far and away the most versatile amp, with a million preset sounds in it named after famous songs or artists, such as "Flyin' High" to mimic the tone of Randy Rhoads, and things like that. I recently bought the 10-button foot controller and I'm really lovin' the combination of the two.
This amp is no longer in production, but if you can find one used, it's highly recommended.
Oh, and I recently interviewed Phil Collen of Def Leppard, and found out that the Cyber-Twin is one of his main amps as well...