With all due respect, Rocky Bernard hasn't been the Seahawks best DT for several years now. Marcus Tubbs was the 'Hawks best DT in 05, his one and only healthy year in the NFL. Mebane has been our best DT for the past two years, not an aging Bernard.
I e-mailed this to Matt and Walter before, but one thing to keep in mind is Tim Ruskell's draft history. Running Seahawks drafts, he has shown a strong preference for experienced college players:
Lawrence Jackson (Four years, 51 starts)
John Carlson (Four years, 31 starts)
Josh Wilson (Four years, 28 starts)
Kelly Jennings (Three years, 29 starts)
Darryl Tapp (Four years, 30 starts)
Chris Spencer (Three years, 11 starts)
Lofa Tatupu (Three years, 38 starts between Maine and USC)
This trend goes back further through past drafts he was involved with in Tampa and Atlanta, where there was a general preference for experienced college players.
The only exception with the Seahawks was Chris Spencer, who's been a borderline player at center, but was drafted as a great physical talent with a really high upside. I think Ruskell might feel burned by that pick - Spencer is clearly not a first-round talent at this point. Crabtree would be another low-experience, high-upside talent, but Ruskell might balk at the lack of college game film and experience after the Spencer pick.
Seattle's biggest failure last season, outside of WR and OL injuries, was an inability to rush the passer on defense after Patrick Kerney got hurt. I think the Seahawks will draft a pass-rushing DE. Lawrence Jackson is more of a rushing down DE, with his size (270lbs) and power. Having a pass rushing DE to compliment Kerney would provide the best value for the Seahawks needs at this point. Kerney is also getting a little older, so finding that pass rusher should be on the Seahawks mind.
It should be Brian Orakpo. 19 starts, four-year player, 47 games played, great pass rush skills. His biggest knock is his game against the run, which he wouldn't be expected to excel at right off.