Well, pretty soon I'll have the 300B and 45 amps. The 300B is stereo and the 45 monoblocks.
Of course I have your Pi 1.6K crossover with separate inputs and outputs for woof and tweet. 
With the bananas and the parallel resistor I can switch on the fly from music amp to HT Receiver and from 806A/811B to 902B/MartinelliHorn.