That's interesting, I did not know that Beseler made a cold light. Anyways I have an aristo cold light on my 45mx and love it, it works great. I have used the condenser too but prefer the cold light. It has been a while since I have used a condenser, and may mount it back on again soon just to see what it's like. Try them both out and see! I like the piece of mind of using a cold light as there's virtually no problems with negatives being damaged. The warm up thing is kind of a hoax, it should have 2 plugs, and one just needs to be plugged in to a constant source (not the timer) to keep it at the right temperature. It takes about 2 minutes, which is almost nothing compared the time it takes me to get my darkroom set up for printing each time.