I like this place for electronic accessories. It's cheaper than Future Shop and Best Buy and they have more specialized goods for the electronics nerd like myself. Eg. I can get HDMI-mhl converters here whereas they are harder to find in the big box stores.
They also have some really great sales here on the big ticket items, but I'm always a bit hesitant because their refund/exchange policy isn't the best.
Verdict: great for small ticket items, but do your research before buying the big ticket items.