A) Long-term and safer value lies with Luck. If you want the QB that stands the better chance at being in the league in 10 years, then it's him. I trust the Colts front office more than I trust the Redskins, when it comes to patience and development. Nothing about Snyder says "stability", and when it comes to QBs, once the Redskins cut bait on Griffin in 3 years, for whatever reason, there is no telling where he lands. I'd claim to trust Shanahan, when it comes to Qbs, but Snyder just needs to sneeze once to despise and fire Shanahan for not saying "God bless you".
B) Vince Young, Vick, McNabb, Culpepper: running quarterbacks who ran into injuries, and inconsistent play because of it. If Griffin is expected to be a runner, then he's set up to have a few monster seasons, and a lot of what-might-have-been type of years.