I routinely play with Nikes Vapor 9, 2k12, Lotto Raptor, Diadora Speed Star and Asics shoes, but every time i feel my knees need a break from the hards pounding they get playing on hard courts all the time, i turn to my Yonex SH 308.
They are, by far, the most forgiving shoes for worn-out knees. They feel like slippers, are light and stable and provide good traction.
The Raptor isn't bad, but my gripe with those is the lacing system which sometimes becomes loose.
In summary, the Nike zoom air unit is comfortable enough, but when additional TLC is required for my knees, i go to my trusted Yonex.