IMHO, the under is the best bet followed by the Seahawks getting 1.
NE is going to try the running game with their bigger backs like GB did with Lacy / Starks (Lacy got 21 carries but Starks averaged 8.8 ypc in his 5 carries) while also dinking and dunking. That will burn the clock and will move the chains some, especially with Mebane and Jordan Hill out, but Bennett's versatility allows him to slide inside in case Kevin Williams or Tony McDaniels needs a breather and then Dobbs can come in for run support or O'Brien Schofield (who has been playing well lately) can come in to pair with Avril on passing downs.
The Seahawks should also be able to get a reasonable amount of pressure on Brady when rushing just 4. Brady's numbers are amazing against the blitz anyway and he's a statue back there so the D knows where he's always going to be.
Do any of NE's WRs scare anyone? I wouldn't be surprised to see Carroll / Quinn play a cat and mouse game moving Chancellor in and out of the box since they can keep ET deep in Cover 1 man or maybe we'll even see some Cover 1 zone (with 6 defenders in underneath short to medium zones) with the speedy ET playing deep CF.
Gronk is obviously very good but KJ Wright is 6'4" and Irvin is 6'3" so his height advantage isn't as pronounced as when he's gone against LB's who don't have that length.
Perhaps the most underrated aspect of this game is that Justin Britt is back at RT and Sweezy's ankle enjoyed another bye week. Bailey was pretty bad against GB and that hindered the offense, particularly in the 1st half when the running game mostly sputtered and Wilson threw 4 INTs.
I also think Seattle will find a way to pick on Browner in the passing game just enough to make some plays.
So I see Seattle winning 24-20 with the most confidence in the under.