I just wanted to note that an ALL-IN-WONDER card will do you very little good if you don't plan to run your cable TV signal through it. All-In-Wonders also add TV signal viewing functionality stuff like timeshifting and channel selection. You can also capture video with them and edit it.
But if all you want to do is watch DVDs on your home theatre and play games, any plain-jane Radeon with TV-out will run DVDs just fine, and have DVD motion compensation built in for really great playback.
If you have an HDTV, you can buy a dongle to output HDTV component signals for only the Radeon 8500, or 9500/9800 series cards. Otherwise you'll have to use the SVHS output, which isn't as good but is still OK.
The dongle doesn't come with the All-in-Wonder cards, unfortunetely. You have to buy it separately regardless of the Radeon you buy.
If you want a remote control, the Remote Wonder that DOES come with Radeon 7500, 8500, and 9700 Pro All-In-Wonder cards *is* absolutely fabulous though, and they're not too cheap separately, so it might be worth it buying an All-in-Wonder if you value the remote like I do.
I don't have an all-in-wonder, so I bought the remote separately, myself. It's really very good. The remote doesn't use IR signals , but radio to communicate with it's reciever, so you don't have to point it at anything and you can use it through walls. It's very cool playing MP3's on your home theatre system and changing songs from another room in the house with it.
Hope that helped and didn't confuse,
- Cleeve