I'm building a system & need a little advice. At present, I have Dish Network
with their dual tuner DVR + a third receiver; what I'd like to do is set up a MythTV system that will do the same thing as the Dish DVR I now have, but will be accessible from all three TV's; I'll be going back to POC [plain old cable].
I've already purchased a Hauppauge PVR-500 card; now I need a good video
card with TV-out [looking at a Nvidia 5200].
So, exactly what will I need to build a system such as this ? I have a good PC [Asus mb, P4 2.4, 1GB ram, 400GB HD] to base the system around, but was
wondering about remotes, and if there are wireless remotes available.
Any comment & suggestions appreciated.

See this write up on the wiki:
http://www.knoppmythwiki.org/index.php?page=PickingComponents
It's the entry point to the hardware configs section:
http://www.knoppmythwiki.org/index.php?page=HardwareConfigs