The touringstore.com will hook you up. As Indy has posted, knowing your needs will really help you select the best combo. Like any other trip - Ya gotta know how much "stuff' you are going to pack before you can decide which suitcase to use - so to speak. The touring store can size you up. Figure on spending about $500 - $700 all up on quality bags and racks. Money well spent.
And don't forget the bar bag! A place to keep the things you need to reach, wallet, camera, sunscreen, maps, snacks, etc.