Peyton Manning or Larry Fitzgerald in keeper league?

What do you lose for keeping them? If nothing then Manniing all the way. He is the greater value if nothing else. He'd be a late first or early second round selection compared to Fitzgerald who is likely a third round guy. Not to mention it doesn't hurt to start your year with a STUD QB in your pocket before the draft even starts. And don't worry about his knee. He won't miss any time in the regular season and if anybody can afford to sit out the entire preseason without missing a beat it Peyton.