I think I want a N7 even more now.
HDMI monitors can run anywhere from $160 to $1000 depending on what you need and what you have for a budget. The Nexus 7 tablet comes in at $200 for the 8 GB model and $250 for the 16 GB model. Add to that the $8.99 DSLR Controller app, and a $3 USB OTG cable and you can use the 1280×800 IPS display on the Nexus 7 to monitor and control your Canon camera through the usb port.