I agree with what dwood721 said. If you want best results with minimal frustration, call Verizon Customer Support. They are awesome. I've -never- had any problems dealing with them. Professional, friendly, and knowledgeable.
If you go to a store, you're bound to get the runaround and walk out frustrated. Handle your Tour issue over the phone. Then go to the store and play with the Droid.
Best of luck!