Which fans for MCR320 Radiator?

it works great with low-med cfm fans.
i would recommend low or medium speed yate loons.

The rad is designed to work well with lower cfm fans. It will always work better with high cfm fans, but they are not needed to get good results. I use medium speed yate loons, as suggested above.

yate loon, tri cools, ultra kaze 1k's and 2k's

Alright, thanks for the suggestions. I'm considering the Yate Loons now.
Are the 140mm Yate Loons any good? BTW, If alot of people seem to like these, what are the pros and cons and why are they cheap compared to other top of the line fans?

I have some Xigmatek 120MM XLF-F1253 LED on my MCR320.

They are quiet and are rated at 61CFM

Take a look at Martins rad calc's for that rad.Radiator Thermals and Radiator Calculators - Martin ..Punch in the heat dump from your CPU and the RPM of the fans that you want to use...A little bar graph will pop up on the bottom, thats your rad out to ambient delts. Keep that at 5C and under for good OC temp's, the lower the better of course. CPU Wattage Calc

Me personally I'd use at least this size fan on any rad...86cfm Pana

120x38mm fans have a higher static pressure and better scavange air through the rad.