Thinking of replacing my Bat spaceheater with class D, real world thoughts please

Class d wonderful no heat no good sound try Pass used much better.

When I owned my first two Clayton Class A amps (M200 and M300) I used to believe I needed to leave them turned on most of the time so they would sound their best, in spite of the heat and energy usage.  This time around with my upgraded M300, I am more relaxed about turning them on only when I am ready to listen.  Sure, they sound better and better throughout the approximately 30-40 minute warm-up period and sure, maybe they sound another 3-5 percent better if they are left on for longer periods of time, but they sound so much better than the really good Class AB amps I have owned and so much more satisfying than the NC1200 amps I owned, that I can enjoy them from the minute I turn them on.  Basically, I am saying don't worry about the heat - if you like the sound of your BAT amp you may find the sonic trade-off is not worth switching to a smaller, cooler-running Class D amp.  If you want to try Class D, decide which amps you would like to try, and obtain loaners so you can compare them head to head with your BAT.

@mitch2 
The BAT is just the same, i can tell a difference in sq after it has been on and played for approx 30minutes but not enough that I leave it on all the time, it comes on with a 12v trigger from the pre and that is it.

@mains

I checked out the NORD, looks good and fair price but if I went the ncore way I would more than likely stick to a homegrown company like dsonic or similar but thank you for the headsup!

I recently switched from SS forever and went class D.  I have been a Rega, Creek fan forever and needed to sell off some stuff to bring money back to the family.  So, I sold some higher end Rega stuff and went to Wyred 4 Sound since I was intrigued by it, just like you.  Dare I say, what was meant to be a compromise has turned out to be a real joy.  I have a W4S DAC-2 plugged direct into ST-500 MkII power amp running my KEF LS50.  To me, their best feature is projection of voices regardless of volume.  I listen to a lot of "mellow" acoustic music and Class D has served that music well, IMO.  I also appreciate the extra wattage (I've always had amps <85 wpc).  When I crank it up with the kids and have a dance party there is no lack of slam.  

Also, my dad's system runs bel canto mono blocks.  Unsure of the models but they are 1000 wpc.  He's using them to run Legacy speakers.  I feel the same about the vocal projection.  Feels intimate to me.  His system is way cooler than mine.  

So, there's two very different systems running Class D that I would consider successful in relaying music enjoyment.  

Finally, one of the reasons I invested in W4S is that they are always improving previous models of their equipment with upgrade packages.  By the time you get an itch for "more" you can do it in a more fiscally responsible manner (as if spending all this money on our audio rigs is fiscally responsible in the first place).  

Hope this is helpful.  

The view from the cheap seats:
Comparing a BAT amp to class D is like comparing  Quintarelli Giuseppe Amarone Della Valpolicella Classico Riserva 1995 to Chianti, a very specific flavor to a broad range. Implementation is more complex than Hypex vs. Icepower, just as all class A/B amps don't sound the same.

For what it's worth I recently upgraded from a modest Class A/B integrated to a Primare I32. I am very happy! That being said, I am a detail fiend. I use the Primare to drive Canton Ergo 3 way towers; which are also very detailed.