Welcome to town! Hope you're staying on the Eastside and not downtown Seattle as it's sketchy with all crime and open drug use.
I've been to at least three Redskins vs Seahawks games here, dating back to the Kingdome.
I strongly recommend against going for a $90 ticket as you'll be up in the 300 levels... and there is where the rowdy, nasty fans thrive. They think they're in the Vet (stadium) or something, and harass the hell out of opposing fans. The cops have to dress as 49ers fans to entrap bad actors. Not sure why the Seachickens fans think they're so great... last I checked we have two more Superbowl trophies than them.