I chose the CLF1 with a refugium also had Jeff install the reactor chamber so I can run carbon, phosphate, bio media. I find the new set up more efficient and the skimmer much more functional and user friendly. I do have a chiller as well.
I have the 650. I changed out the entire refugium about a month ago. Have had it set up for just over a year. Went with a lifereef refugium and skimmer