I ran a Bel Canto S300 with Spendor S8es and was very happy with the results. Plenty of power and very solid control of the bass with no trace of any solid state harshness. There is an S300i on Audiogon right now in for less than your indicated maximum price.
I now run Spendor SP1/2Es with a tube amp but I preferred the S300 with the speakers you have.
I now run Spendor SP1/2Es with a tube amp but I preferred the S300 with the speakers you have.