How about the VTL Siegfrieds or the old 1250W Wotans?
Plinius SA-Ref in bridged mode (1000W @ 8 ohms)
Chord SPM 14000 ($75,000/pair)
Clayton Audio M2000
Boulder 2050's
Edge NL Reference ($140,000) Certainly the most unusual looking.
Ayre MXR's might be shy of 500W but should not be neglected.
Plinius SA-Ref in bridged mode (1000W @ 8 ohms)
Chord SPM 14000 ($75,000/pair)
Clayton Audio M2000
Boulder 2050's
Edge NL Reference ($140,000) Certainly the most unusual looking.
Ayre MXR's might be shy of 500W but should not be neglected.