recommendations for amplifiers that don't emit tons of heat

@tripg 
The Ayre were a bit bass shy in their early iterations, but the more current models are not.
I would opt for a good sub, as your speakers aren't floorstanders, should you want full deep bass. 
A Vandersteen sub would allow you to use a lower power amp as it relieves it from the demands of bass frequencies. Plus, it would integrate seamlessly.
B

for an example KT 88’s have a heater current of 1.6 amps each tube....where as the power dissipated is around 5mili amps

glennewdick---As you say, KT88 filament current is specified as 1.6 Amperes. The related filament voltage is 6.3 Volts. That's TEN WATTS of power dissipation that's consumed merely to "light up" the quiescent KT88 vacuum tube. In that state, the tube is merely at passive idle; it's not doing any functional amplification. It's serving only to emit heat + dim illumination. Additional power is then consumed when the tube is subsequently biased to pass current from cathode to plate. That's truly archaic efficiency.

Yes---and 1.6 A. x 6.3 V. = 10 WATTS.

And that power is consumed merely to "light up" one KT88 to a quiescent state, where it does nothing more than emit 10 watts of heat and light. Additional dissipation, over and above this wasteful filament dissipation, is required to perform active amplification.