i heard that Go Fish is pretty good and will probably check it out soon. Pajos is a staple but doesnt blow me away, have been going there forever though. Mr Pickwicks is good too but way too expensive ($18 for a two piece at the downtown location).
Johnnie Fox's is wicked, their red snapper and chips is amazing. make sure you upgrade to the beer battered fries!
http://www.johnniefox.ca/
Rain City Grill does a halibut and chips with a bottled water for only $10. only available in the summer though from their side take out window.
http://www.raincitygrill.com/