Current, Amperage

You don't need anything like that power in that room. You need maybe 50 watts if you want volume loud enough to destroy your hearing. 
I do NOT agree with recommendations to just buy more power than you'll ever need. More gain means more gain stages which means more distortion, and big iron seldom competes well with a quality lower power amp with simple topology. That's the entire basis upon which tube amps are built. 

It's more about synergy, not math.  I have a 300 wpc Mac but usually am using my 10 watt triode.  Running out of power can ruin a speaker and/or your experience but quality is much more important than quantity.  

My math was a generalization but you do need a frame of reference on these things.  Generally speaking you gain 3db for doubling your wattage is a great way to understand why going from 40 to 60 watts is virtually inaudible all other things remaining equal.

Anyone have thoughts regarding the NAD 275bee amp paired with my Chorus/ Focal 826V speakers. Seems like it has really good ’bottom power’ & great mids/ highs, as well as, plenty of power when you need it. Also a good value.

Thanks.