Hmm, they seem to have evolved quite a bit since I had mine. Mine was basically a 100 W monster with two channels and boost per channel, Presence and Resonance in Master. Was a good top but I missed some smoothness, this might be better now.
Also the output power options look amaying, down to 8 Watt, that's cool.
Riveras aren't very famous around here, except that Rudolf Schenker of the Scorpions used to endorse them ... maybe you can get one, do some clips and get us all GASing :)