i did notice that difference, you have to buy an antenna with the 650, which i would not like to do. i dont think ill need any special antenna though, i think the one they include with the hdtv wonder would be fine, which makes me really not want to get the 650 (btw, i live in new jersey, right smack between ny and philadelphia, both within reception range with any weak antenna).
i usually dont mind bad user reviews either, as long as the expert reviews are sound. i usually just assume everyone else is an idiot, and i usually fix any problems that arise.
my last question would be then, are there any different features, or are they basically just the same card +/- the antenna?