I am the friend that Ron17 was referring to that just purchased the CA-2300 and yes I am thrilled with it. Ron probably told me about your posting because I have only been somewhat joking with him about my listening room being cold compared to with my prior amplification, a BAT VK-500se batpak dual mono amplifier which was strongly biased towards class-A and therefor served as a room heater for my 800 ft2 listening room. This was exacerbated because I left the amp on nearly all the time as it was not equipped with a standby mode.
The BAT is a wonderful amp and I will be very sad to see it go but the Classe is better in many ways; clarity, bass, slam, ambiance, are all just better and the difference was not subtle. The design of the CAM-600 is basically a CA-2300 with the 2 channels of output internally bridged together. The ICTunnel design has a variable speed fan that maintains optimum temperature for the electronics and it does not run warm compared to the earlier generations. I also have a CA-5100 for surround channels and this amplifier runs a bit warmer but nowhere near the BAT.
I listen to a huge variety of music from the last 500 years to the last 5 months and I listen at “elevated” levels. My speakers are quite efficient (ProAc response 5) but I definitely like the 300 wpc of the Classe. If you can afford the mono blocks, I would encourage you to buy them, I doubt you will be at all disappointed and they will not heat up your room (to my slight dismay). In terms of preamplification, rather than the older and far more expensive Classe CP800 I recommend you consider the Classe Sigma SSP (either original or Mk2. For a complete 7.1 pre-amp processor that originally sold for $5000 it delivers phenomenal sound and capabilities. Add an Aurender (I have one available...) or a Roon nucleus with an outboard power supply and you have a phenomenal system for a reasonable budget.
If you want to cut your costs in half on amplification. Ron is right, buy a 2300 and you will be thrilled.
One final note... The system as outlined above demands and deserves high end power, interconnect, USB and speaker cables. I am using Nordost Valhalla and they absolutely bring out the best.
Good luck!