If anything, I think you should put the heavier bags on the front. An RS82 on the rear would ride pretty rough I would think.
As for Innovative Air Suspension, I ordered my bags on Friday, and they still honored the price on their web site.
So if anyone is needing some Slam Bags, the $75 dollar price is still on. Just make sure you call them, and mention you seen the website price.
I ordered 2 RS72 for the front, and 2 RS62 for the rear. Next to order is a tank and valves. I plan on running all 1/2 stainless hard lines to everything, with some steel braided lines in tight areas.