There are several 16-17' canoes in the Modesto, Sacramento, and Bayarea craigslists. I've got 3 canoes that I flyfish from. I don't know what your price range is but there's an inverse relationship between price and weight. Think about how you're going to get your canoe to the water. It's easy to hoist a 40-50lb kevlar canoe over your head and walk to the water. Royalex and rotomolded canoes are a lot heavier and less efficient in the water. Aluminum is hot and noisy. Any 16-17' tandem will make a good fishing platform. Some names to look for:
Mad River explorer (nice kevlar model in the SAC craigslist)
Dagger (Nice 17' venturet in the SF BA craigslist)
Wenonah Adirondack (16' royalex in Danville on SF BA craigslist)
Old Town Camper (16' wide royalex on Modesto craigslist)
Old Town Discovery (16' royalex -- more efficient/a little less stable than camper on Stockton's craigslist
Also check California Canoe and Kayak's used boat list:
http://www...om/forsale_list_full.cfm
They have a store at Jack London square and you can try the boats before you make a decision. If you can swing it the Mad River Kevlar Explorer would be a great boat to put an offer on. Canoes like this aren't available in our area very often as NorCal is mostly kayak country I think. The Kevlar boat is going to be light, quiet, and efficient. While not as collision proof as royalex or plastic, you're not looking for a river boat and kevlar is very tough and easy to repair. The guy wants $1500 with $200 worth of paddles and accessories. Make him an offer if you think that bout will fit your needs and your budget.