Get what you can get the most use out of.
If you can fish/boat regularly and only get a canoe trip once a year, then its cheaper to rent a canoe than buy one and have to store it safely the rest of the year.

I'm all for the "green" aspects of the canoe for fishing/recreation locally, but if your fishing/recreating on most waters that are popular destinations and are open to motor traffic, the canoe isn't the best choice IMHO.

I see a lot of people buying those fishing kayaks and there nice and the price range is relatively cheaper than a good Kevlar canoe.

Problem with any non-motorized vessel on lakes with motor traffic, is that once the boaters/jet skiers the water, your spending as much time worrying that they see you and don't swamp you by getting to close than enjoying the benefits of human powered craft.

In the area I live in, early morning/evening is when you see the kayaks/canoes, once the power boaters/jet skiers hit the water, they disappear ;)