Wavac SET tube amps with different output tube

Hi. Wavac have different levels(MD,EC,HE and SH) of their SET power amps.Anybody heard them and how good are MD-805MkII 60W mono blocks with separate PS in comparison to HE-805 50W stereo amps and to HE-833Ver 1.3 150W mono blocks.
My speakers have 95dB sensitivity and 8Ohm impedance(tube friendly).
Thanks in advance