Despite the issues, CPRO8 is stable and low on CPU here.

I would agree even though my projects are not as large as mentioned in your text. CB Pro 8 has been stable and very useable. I use a lot of VSTi and external hardware. Initially, I had enabled ASIO Guard with buffer of 512 KB; I found that with ASIO Guard dis-abled, my system was more stable and latency has not been a problem.