I agree with you about Marino, but he didn't lack weapons. He had an excellent offense. But Marino's defense was awful. When the Colts D was bad, Peyton was putting up 14 points.
I would take Marino as my QB any day over Peyton. Peyton is great, he manages a game well, but he has a propensity to choke and panic when things aren't going well. When the Colts were controlling the ball yesterday, and Peyton was getting a lot of time to throw, it was game over. He's just too good to lose at that point. But he's a choker in the tight spots.
Marino, on the other hand, was incredibly calm in the pocket, and while he was the biggest doofus of a QB, could hardly run at all, he had more command of the pocket than any QB I've ever seen. The only one who comes close to Marino in that regard is Tom Brady. Marino could sidestep rushers easily. He had eyes in back of his head, and his quick release saved him multiple times.
Marino had the arm strenght and accuracy over Brady, but that wasn't always a blessing since he threw interceptions. And like Peyton, he lost his cool on the field after bad plays, constantly chewing out his teammates and coaches. I'm not saying that Marino lost his calm in the pocket like Peyton, but after plays his demeanor didn't help.