I ordered my alum Visions on ebay, best price I found and here within a week.
To me the added weight of the steel isn't worth the cost for 350lbs gain. The 245 gets you 9000, the DRW RAWR is 9350 with a 10,912 axle and 12K worth of tires. IMHO, stay at 9,350 or less.
Buzz, what psi where you running in the 285's? Slow leak, or road hazard? I really doubt it was weight related unless they where under inflated, or heavier than you thought. Just thinking out lout... I see all kinds of overloaded 265/70R17, by thousands of lbs, and rarely see a blowout. Not condoning, just saying. I run 19.5's and rarely top 6200 on the rear axle, so you know where I stand.