What camera are you using. Many modern ones have mini HDMI and can plug straight into any modern TV or PC monitor.

Here's an example with a 7D. http://www.youtube.com/watch?v=nzsaux-uF9Y

Keep Monoprice.com in mind for any cables and adapters you might need (Typically 10X - 20X cheaper than Canadian retail... not sure how they compare in the US)