First off sorry. I screwed up. The 1st thing I did wrong was think Beckett's option was 10M, when it actually is 12M. Why don't I try again:D
Listen I think he should get an "AJ" type deal. Maybe a little more since he is signing early. As far as I concerned(and maybe I'm wrong) but Beckett and Burnett are great comparisons when it comes to the stats. Beckett having more playoff experience. AJ starting in 1999, Beckett in 2001.
So with that I think Beckett should get a deal for 5 years, @ 16.5 AAV. Maybe add a million more then AJ's AAV(16.5M I believe) for signing early. And Spread it out however. But I think that's a reasonable offer.