I ran this by my brother who is a plastics engineer and we’re going with the CF-PETG for a couple reasons.
First it’s way more rigid than regular PLA. CF-PLA is even more rigid but not by a whole lot more than the CF-PETG. Second is the glass transistion temp. CF-PETG is a full 20 degrees C higher than the CF-PLA. That’s piece of mind knowing that if my motors really heat up parts won’t fail. Third is cost. Both the CF-PLA and CF-PETG are in the $50-60 price range for 750g. CF-PC (that my machine can print) hovers around $90. I’d also be pushing my 3D printer close to the edge of its operational ability with this material - even regular PC. That machine breaks, I don’t have a backup.
Anyways thanks for your help and insight everyone! Very helpful.