Jim - If your trying to save money. Do get a four corner weight, as you know with your experience, that is always a good thing to do with a new to you coach. This will then allow you be be sure you pick a tire that supports your front axle. (Why guess?)
And Brets point about tread depth is an often overlooked part of the overall coach handling equation. (I was at TCI Tire Center in Colorado Springs during a tip last year. A gent ahead of me was talking with the shops Manager about replacing his new to him ties. He said he had taken one trip on them and that the front of the coach was hard to keep where he wanted it, said he was seemingly need to always steer this coach. It turns out he, the coach owner, and requested a specific tire when he came into the shop. I felt the shop Manager did a great job. He explained that that tire had a deep tread, and though it was rated for steers, his opinion was that the tire was not appropriate for his steers. (And reminded the coach owner that he had voiced that concern when asked for that specific tire to be installed.) A bit later I talked to the owner, and he said he'd had four sets of tires installed on two different coaches. That the Manager was fair, and he felt that the shop did good work. He said the Manger offered to take the steer tires back, install a different model, and only asked for a $50 per tire, plus the cost of mounting and balancing the new tires. (And I felt that was also pretty dang good, as that tire is now 'used' and would need to be sold as such.)
Long story, to confirm that the wrong tires, especially on the Steers, could result in an uncomfortable ride.
Best of luck to you on your final decision,
Smitty