I run push / pull on different type fans. I have Scythe 110 CFM 1900 RPM push with 68 CFM 1600 RPM pull on my 360 MCR 320 rad. I don't get any pulsing. I shut down my push fans unless I am gaming or other high load and it works and sounds great. Not very scientific,but there is some feedback.
Still waiting to see different fan setups with the Swiftech sandwich to see if it is ever worth it.
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