How hot is hot when moving from class a/b to to a or tubes?

@blisshifi  thanks for that. Yeah I don’t feel I am getting what I can from these Zu’s. I will take a look at some of those. It’s close to 9ft away from the amp, so good shout there. 

@tooblue - it doesn’t get Texas hot here, so sounds very hopeful. 

@hoosierinohio ive been looking at the decwear stuff. Looks really nice and reviews well. 
thanks

Where to even begin…. All of your responses have been really helpful. Massively appreciate the time taken and passion for the subject. 
 

I have take all your suggestions and will start my research for my new purchase. 
 

Thanks again. 

@erikt - I have never thought of the cross over point from a-b. I wasn’t sure how class a/b worked. I thought it was it’s own class. Given what you said there will be no way I am leaving class a. 60-80db as top listening volume. 
I got some -28db attention cables, that really helped get the dial round and really improved the sound and detail. I do however run the loudness on most of the time to give it a little, but needed kick in low end. 

@decooney 

i kept the hot question vague for the reason you describe - want to get a gauge on how others articulate it. My main concerns were: potential burns to the kids (probably their friends. Thanks @jonwolfpell for the cage comment), how much it will heat my already hot home, anyone speaking about shutdown modes from over heating (there are few Texas folks running them in the summer, the UK won’t be hitting those temperatures), hopefully getting some insight on what experienced owners would do if they were starting out again. 

I’ve never owned tubes so I have too many unknowns. 
My next stage will to start home demos and take it from there. 

@carlsbad i hear you there. I will be looking at single digit wpc. 
very excited for the next steps.