Peyton is done, all the reports seem to be pointing to lasting nerve damage. I think he'd be best off calling it a career now before he gets seriously hurt.
I love the draft, Andrew Luck will go at one to the Colts, he's the hottest qb prospect since John Elway.
I think RG3 could be fantastic as well. Think someone will be trading up to 2 or 3 to grab him.
Peyton to Dolphins will probably be a no go. He needs to go somewhere with weapons and a good O-Line. Dolphins have neither, they have a good LT and that's it. Arizona has much better pieces for him and they maybe just need an upgrade on the line in the draft.
San Fran (my team but hear me out) would be the best destination for him, it's got the line, running game he's never had, one decent WR and great TE's. However I don't think Harbaugh would be willing to hand over the keys to the entire offense which will make it a no go.
Arizona for Peyton I think and it'll be Montana esq and sad for Indy fans. He'll take them to the playoffs a couple of times, maybe even win a game or two post season, but it'll never be a superbowl appearance.