I heard good things about GB PVR. It's free. I'm going to install it one of these days.http://www.gbpvr.com/screenshots.htm
BeyondTV is rather expensive, US$ 70 if I remember right from their Web site. At this price we're better off waiting for a FutureShop or BestBuy sale and then buying a PVR card with software included. A few months ago they had a Hauppauge 150 PVR on sale for CDN $70 and it included BeyondTV.
------- I don't really know what I'm talking about, just reading from other forums, so take this info with a grain of salt, OK? Good luck, and please post what you find out -------