Quest - you can get below invoice and it has lots of standard features where you need to pay $$$ for other Jap minivans.
Don't know much about Sedona, but minivans are quite different on chassis: american vans and Sienna are Van bases (torsion bars for rear suspension): Ody is based on trucks (so not as comfortable and quiet); Quest and Hyundai's minivan are based on sedan (Altima)with 4 wheel independent suspensions (drives and handles better).
Quest's engine is the best in the class, and you need to test drive it in order to appreciate the powerful VQ.