As an owner of a Canon 7D, you will most likely need to buy additional cables for your setup. What you will find is that there is a huge difference in price for cables.  Especially the mini HDMI cable. Originally, I looked at local dealers for cables with no luck. The cabled where the wrong length, wrong color and way expensive.

A quick look online and I discovered www.monoprice.com. For about ten bucks, including shipping I got exactly what I wanted. In fact, the price was so right that I also got a short 1/8″ mini cable.

If you are looking for good cables at great prices, www.monoprice.com is a recommended first stop.