Tires - Again - Still - Yet

So far I've visited five tire shops. Even when I wanted to talk about Brigestone Duravis, specifically R250, most didn't seem to want to. Today the fifth one had somebody showing me tires on the computer and the manager walked up. Asked what we were working on and when she found out made a phone call. Sent me back to the fourth shop where manager was on duty, not the assistant when I was there yesterday. Said our weight called for the commercial grade rib R250's and would rather lose the business than put me in something that wouldn't do the job. So it looks like the plan is to find the best deal and freshest date codes I can find on Duravis R250 tires. The selling price runs about $50 per tire more than the Michelin LTX M/S2, the BFG Commercial, and the Duravis R500. R500 is an All Season or M/S tire and I'd prefer Rib. The M700 costs a little more than R500 and is an All-Terrain tire which I don't need.
I should have all the info I need by tomorrow and hope to get a full set of seven and be done with it for awhile.