I’m a dual citizen of Canada and the US, so both options are reasonable for me. I’ve calculated the costs of going to each university and they are nothing outstandingly different price-wise.
Thanks for the suggestion about posting on the UW forum. I’ve moved this discussion there so I’d appreciate your responses there: http://talk.collegeconfidential.com/university-washington/2058930-best-school-for-engineering-p1.html?new=1