You can only have the beers of one brewery for the rest of your life. Which one would you choose?
Keep in mind how much style variety you want and the availability. Nothing but Westy forever may seem like a good idea but are you willing to make regular jaunts to Belgium or spend your life savings on ebay in order to get it? And you'd have to give up stouts for the rest of your life!
If Port Brewing/Lost Abbey is considered one brewery I would choose them, if not; Deschutes.