WARNING - do not bid 3* airport for Vancouver! Often the coast airport comes up, I sure do not think it qualifies as a 3*.
Downtown most of the 4* are good. Hyatt is my favourite but I can get a pretty good rate without priceline in the winter, and during last November-February every couple of stays earned free stays.
Also the Hilton in Burnaby is not bad, and the winter rates can be pretty competitive with PriceLine. I have seen if for just over $50USD in the winter at Hhonors.