XServe in XrackPro2 Rack Temps: Need Other Owner Advice!!

So as part of a new network deployment which mandated that the X-Serve (Dual Ghz Intel (2 X 2cores) and X-Serve (7TB) be in the same room as clients, we purchased an XRackPro2 6U. We have installed a Gigabit Switch, Fiber Switch, Xserve, and XServe Raid. We're noticing that the temps with the door closed are 10 degrees warmer than with the door open.
Door Close
Left Inlet 84 Degree F
Right Inlet 77 Degree F
And the fans are 8200 In and 4800 Out Across the CPUS
With the door closed the Inlet temp jumps to 95 and Fans to 12000 and this is with the server under NO load.
What are other users of this rack seeing? The room is climate controlled to 72 degrees F.

How close are the front of the Xserves to the door? The airflow of the Xserves is front to back so you need some clearance in front of them or you can get a "dead spot" where air flows around the unit but not to the front of the Xserve. I think the high inlet temperature is a sign that the air is circulating around inside the unit rather than getting good in-out flow.
If you have removed the extra insulation so the unit is as open as it can be and the Xserves are at the same level as the exhaust fans I'm not sure what else there is to do. Some people advocate filling any empty slots with the 1U blank faces to restrict clear front to back flow except through the servers but I'm not sure how much I believe that really helps.
I have used both of the bigger units (12 and 24U) cases and they do run cooler with the door open but they shouldn't vary that much. One other warning - don't leave the back open with the front closed for any amount of time because opening the back moves the exhaust fans away while the front flow is still constricted.
My $.02,
=Tod

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