I just changed my wife's 2007 Odyssey with Motorcraft 5w-20. Cheap and good. I can't find a reason to pay double/triple to go full synthetic when MC performs for a fraction of the cost.
I'd use Motorcraft 5W-20 is you're going to change more often, and either Amsoil/Mobil1/Penn Platinum 0/5W-20 synthetic if you want to extend things a bit...