Thanks for all the input. We have just purchased this rig and are going over some things before our first adventure in it. I figure we have two or three hundred more pounds of additional stuff to add so I am looking at approaching the 8000 pound mark in the rear on the inflation chart. I'm a believer in letting the tires be the first part of the suspension system and having them being harder than necessary makes for a more jarring ride, so I am agreeing with the 55 front and 60 rear crowd. I do keep a heat gun onboard so I will be watching that consideration closely at first.
This rig is a 24 foot rig with a rear kitchen, so it doesn't have near the axle weights as the longer rigs. The model is noted in my signature for those asking about the size.