First lets go down what a rough concensus, but in my ordered, would be of good sounding amps that can drive almost any load: ARC Ref 600 or 300, Krell's biggest, Boulder's best, VTL's 1250 and 750 sigatures now it gets dicey with Atmashpere's MA2MK11, Wavestream and maybe the Walcott's. Second, a larger group of smaller amps that do require some speaker matching: Nagra VPA, VAC 30/30, SF3, Pathos Twin Towers, Pathos Monos, Roland, Boulder, ML, ARC, Krell, Air Tight, Wavelenght,WAVAC-HE 833, and the Marantz T1. Note that budget wasn't a consideration. The ones I would love to have for their sound and their looks would be: Marantz T1, WAVAC HE833 and for SS the big Boulders. Those are my opinions and dreams. Oh, if I just had to live with one aroung $5K then I would get the Pathos Twin Towers and have Scott Franklin modified it because I heard these and they sound great. Have fun!