I suspect Michelin Primacy were the OEM tires for the van. That’s what came on our 2012 Odyssey.
The dealer is generally restricted to recommending only OEM parts. Partially because that’s the “safe” response… and also because he’s likely to have a set of marked up tires in the back he wants to sell you. 
Put any set of tires you like on your van. Go to Tire Rack or Discount Tire for recommendations.
Personally I’ve had good luck with Yokohama and Cooper tires on our Odysseys.