I have something I got on ebay that I like the best and another which is a MS one, which is okay. I switch back and forth. The ebay one is the one that is positioned over the puppy pen. I use the MS one when the pups are in the kitchen. I use a 16 ft. Belkin cord to connect to the computer.
I got a wireless one on sale at the Future Shop a few weeks ago, just over $65.00 and have been watching a friend's dog in my dog room for the last 4 days while I'm at work. Its so amusing, my goodness.
Check future shop. If you have a wireless router, its pretty easy to hook up. I didn't want cords etc so went wireless.