At 86 dB sensitivity and 4 ohms 300W should provide dynamic peaks to 110 dB - sounds pretty adequate. And FWIW I believe the mfg specs power to 250W.
Magnapan 35r and Hegel C55 Amp
Just purchased a set Magnapan 3.5r and Have a Hegel C55 Amp. The amp does 150 / 300 / 600 into 8 / 4 / 2 Ohn and I plan to biamp. Do you think that would be OK? I know that more power would be better but this is what I have now.