Nice going Troy and welcome to the club.
Just to settle some ambiguity here; As David said -38 from ambient and -45 with water cooling. I have been using -20C on nights where the ambient lets me, but on hot nights you cannot reach -20C. If the ambient is 20 degrees and stays there you cannot reach -20C. Added to this, be mindful that if you are at -20C at 80% power before you start imaging you will not have enough head room. That extra 20% is not enough to maintain that temperature. It will heat up quickly taking images and struggle to stay at -20C. During Autumn and Spring -20C is often the case and water cooling is unnecessary.
In my estimation this is the only bug bare of this camera. I have suggested to QSI that a larger cooling TEC unit be installed and have the design changed a little. Something is being considered but it will likely be sometime yet before larger cooling units will be available.
Great camera otherwise, and you will enjoy many of its features. As Ford would have said, Yes you can have any colour you like so long as it is blue.