Most powerful and popular EL34 tube amp?


What woulg be your pick?
I am looking for a stereo tube amp based on EL-34 which should have enough power to drive 4ohm 89dB speakers.
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I use the CTA402 integrated to drive my proac response 1sc and they sound terrific.
The Copland 504 is a great amp. 50 watts is the rating but it will do 80 easy. It was 5000$ new in 2001. I own one. 4 KT-88,s or 6550,s