drbarney1, the air bearing is to reduce friction to a minimum not reduce rumble. The rate of travel is so slow that the frequency of any noise associated with the movement would be less than 1 Hz.
Air bearings have their own problems. The biggest one is the pump after that is the noise. Air makes high frequency noise as it passes through pores and passage ways. It is impossible to get rid of it all.
I personally prefer any of the great 12" pivoted arms but if you absolutely have to have a flat liner take a good look at the Clearaudio TT-5 It is relatively inexpensive and works great with any medium compliance cartridge.