Living With A Class A Tube Amp

Thank you for all of your responses.  I sifted through them and here's what I've been able to discern:

1. Class A amps produce more heat than typical amps.  Placement may need to be considered depending on wattage and style.
2. The additional heat may reduce tube life by as much as half. 
3. Operating costs will be higher due to more frequent tube replacement.
4. Class A tube amps have desirable sonic qualities, but other current tube or solid state amps can produce equally good sound quality without the drawbacks listed above.

I have 4 single ended amps, 2 SET (triode), 2 SEP (pentode) ranging from 8 wpc to 23 wpc driving several different speakers that range from 88dB to 99dB sensitivity.  I’ve never had the volume pot on the 23 wpc “beast” past 11 o’clock on any pair of speakers I own.

The Sonus Faber VIII looks to be 90dB sensitive, and the Rogers @ 55 wpc. Unless you’re seeking concert hall or jet engine sp, the Rogers should drive the Sonus Fabers just fine.  You’ll likely only push 10-12 watts, or less, at normal listening levels, its the dynamic transients that you need extra headroom for.  
 

Rogers specs the EHF 100 @ .01% THD @ 55 watts, which is incredibly low for a tube amp. A good 300b SET will hit 3-5% THD at 8 watts. You’ll have little to no distortion or clipping with transients with those specs. Rogers looks to be a very solid build, my guess is it would drive the h**l out of the Sonus Fabers! 

I use a push pull with a quad of KT88 tubes; it consumes about 2-300 W and has an output of about 35 wpc. I definitely generates some heat. The tubes themselves are like exposed light bulbs. The majority of the heat seems to come from the transformers. Mine sits on a shelf with at least 6 inches of free space around it and nothing above. If you put a hand within about a foot, you will feel significantly radiant heat. 

I second having Brandon build you a pair of SET amps.

The tubes will last a long long time. 
I’m powering my 92 db speakers 4 ohm with  833 monoblocks at  33watts per channel and they have more thanks enough power. 
 

A 200 Watt amp will use 0.2 kilo-watt-hour in 1-hour. So, 5-hrs/day x 7-days/week gives you 7 kWh. At current Minneapolis rates that's about 17.7 cents x 7 = $1.239 cost per week, or $5.31/month. No biggies.