Any suggestions on coolest running monoblocks?

The new Rowland 201's are a pair I can think of.

I second Rx8man's recommendation. My Channel Islands D-100s replaced a pair of Antique Sound Labs 1009 (parallel 845)tube monoblocks driving Vandersteen Model Five speakers. I was able to compare the D-100s to the NuForce Ref8s. In my system, the D-100s were a better choice.

Dusty has struck the perfect balance between solid state (control, frequency extension) and tube (imaging, holographic mids) topologies. Highly recommended!

Do you need monoblocks? I was really impressed with the Spectron Digital One amp when I owned it. There also happens to be one for sale now on Agon [please note that I am not acquainted with the seller, nor do I receive any remuneration for this post].

For around $4 used you can buy a pair of Bryston 7B-ST monoblock amps, which are one of the best monoblocks you can buy, and also fill the bill for "running cool".

Thanks all for your input.

Fatparrot - maybe I don't need monoblocks with this type of amp. My limited experience has been that when going from a single stereo amp to two of the same amps bridged mono, the channel separation, clarity and dynamics were significantly better. I assumed that the total isolation of circuits was the main reason for much of the improvement. Furthermore, since manufacturers are making monoblock digital amps, I though that there might be some sonic reason for doing this (not just to make some extra $$$). Any thoughts?

Wrp - what differences caused you to favor the CI units?