Guys I build alot of linux boxes for friends and customers and always wanted to do a setup box with knoppmyth I use almost exclusivly Asus boards with Amd cpu's so I have the pc running just stuck in a 250 gig hard drive and have latest knoppmyth downloaded , what is the best tv tuner card for knoppmyth. On my current ubuntu desktop I have a pinnacle that runs tvtime just perfect but for my htpc I want to make sure the tv card works?

For SDTV one of the Hauppauge PVR cards. For HDTV probably the PC HD-3000.

Why the pc hd-3000 versus the airstar hd5000?

Because I know the hd-3000 works. If Human or someone like that says that the 5000 works too I'll believe them, but it''s not something that I'm currently aware of the status for.