I recently travelled (to Seattle) for work and stumbled across Pho Than Brothers and gave it a shot. Hands-down the best pho I've had. I got the extra-large bowl and drew worried looks from the waiters who feared I wouldn't be able to finish, and when the bowl came to the table I did freak out a little because I could have dunked my whole head in that sucker, but all was forgotten because the vegetables were beautifully fresh, the meat paper-thin, the broth rich-tasting, and the noodles fresh. They also serve hot cane tea and delicious cream puffs made by the owner's wife and daughter. There are several locations through Seattle, and they are all listed on the website. Had my trip been longer, I would have checked out the places near UW, but that's for next time ...
image from NW Asian Week