Leave solid state amps on? Or turn off everytime?

Musicnoise- that's very useful information. Thanks.

Hm... this is all very interesting. In regards to power usage, if you leave a SS amp on, isn't it not using very much power if it is just sitting idle vs. actually playing music? I would think that if it isn't playing music it shouldnt be using very much power... I have a kill-a-watt meter and I will see what my Bel Canto 1000W uses at idle and let you all know.

Also, re: power ripple / surges etc. Is it worth getting some kind of power regular to regulate this?

Solid state is too broad a category. My Pass Aleph 30 (class A) at idle used far more juice than my JRDG 102 (Ice Power) will wide open. If your Bel Canto amps are Class D as I suspect they are, there is no reason to even think about this topic. Just leave them on all the time. You can tell a lot by how hot your amps get. If they stay cool, don't shut them down.

Danyal711 - Ref 1000 idle power should be in order of 15W. Average power when playing music won't be much higher - usually few percent of peak power (maybe slightly more if you play heavy orchestral pieces)