Steinmusic SP 1.1s for my Wavac MD 300

Would a higher power SET using 845 or 6C33C tubes, let's say 40-75 WPC, possibly offer the best of both worlds?  Would I still need to consider single driver designs or 95 dB plus efficiency multi driver loudspeakers?  Thanks again to all.

That much power would work just fine, IMO, unless you have a huge room or want to reproduce concert level sound. 

Thanks so much Swampwalker and Fineito.  I found a recommended SET from
Audio Mirror with 45 WPC using 6C33C tubes in parallel single ended design.  Given a smaller room at 14 X 16 ft should this drive sufficiently my KEF Reference 3's at 87.5 dB sensitivity? I guess I'll try it before purchasing single driver or higher sensitivity loudspeakers.

Normie- The nominal impedance of 8 ohms is OK but the minimum of 3.2 is not ideal for a tube amp. Could not find an impedance w frequency graph to see how severe the curve is or what frequency the minimum is at, or if the published sensitivity is realistic.  I found that 30-40 WPC tube amps could drive my 89 DB Merlins just fine, but they had a very flat impedance curve @ 6 ohm nominal.  Maybe AudioMirror offers a return policy?  Be aware that the 6C33C tubes run VERY HOT.  Great sound but VERY VERY HOT.  I would not use them around young children or in a hot climate unless you have cheap power and good A/C.