media pc

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I am creating a media pc and i have a ati wonder pro remote control edition. I am looking to get a media pc going and so i was going to add a second card so that i can watch tv while i record something or record more then one thing at i time. I am getting beyond tv by the snapstream company which i have tried the trial and i think its the best i have seen. I was going to get the bundle and they have three packages that i am looking into:

1. They have a bundle that offers beyond tv, Hauppauge WinTV-PVR-150 and a IR Blaster. for 149.99
http://store.snapstream.com/btv-pvr150.html

and

2. The have a bundle that offers beyond tv and Hauppauge WinTV-PVR-150MCE for 129.99.
http://store.snapstream.com/btv-analog.html

and

3. They have a bundle that offers beyond tv, Hauppauge Win-TV-PVR-500MCE, and Hauppauge A/V Cable Set for 199.99
http://store.snapstream.com/btvandpvr500.html

Here is the thing. I want to be able to use the pc while i am recording which means i want the built in mpeg encoder to work very well. I am willing to spend more money if it is actually going to get me somewhere. please let me know if you have any of the tv tuners that come in this package and how well you think its going to work. let me know if you have any other advise for someone who is trying to put together a media pc. thanks for all your help.