EyeTV doesn't have a windows version. I've not used the light version before however I have been a user of the full version for some time and actually paid for the upgrade from 2 to 3. I do think you'll find it worth while. EyeTV is the slickest retail tuner software available IMHO and even has set top box support if you have the right IR Blaster.
One thing you might try is to see if you can get a full version of EyeTV 2.0 for Mac from eBay for cheap and then upgrade to 3.0. El Gato let's 2.0 users upgrade for $39.00 rather the $80 for the full version:
http://www.elgato.com/elgato/na/mainmenu/buy.en.html#software
Good luck
Phil