If there was one backup QB in the league I'd be targeting as a GM, it'd probably be Logan Thomas in AZ.
Originally a 4th round pick, Thomas is of a size with Roethlisberger and Newton, played 40 starts and 47 games at VT, and has the arm, foot-speed, and athleticism to succeed if he is coached up properly by someone who knows what the hell training QBs is all about.
That's not to say the Jets organization currently employs anyone in that aspect that does, just that if they did Thomas could prove to be a long-term healthy QB for the next decade and like Roethlisberger, perhaps become a franchise QB over time.
Big Ben wasn't all that in his 1st couple of seasons as a starter either. In fact, was downright shitty in '06 & '08 - 3 & 5 years into the league - but look at him now.
Currently AZ isn't all THAT high on Thomas, since he hasn't immediately proven to be what they were looking for, but over time, and for a reasonable draft pick, HYATT™ believes the deal is there to be made.
Acquire him, send him off to Favre training camp for a while, and when he recovers, you've got yourself a confident live gamer.