advice re: video card/tv tuner

[mepletzer]

I am looking at setting up my computer with BTV 3.5 mainly to be able
to pause live tv and maybe record the occassional show. I will also
still use my rig for playing games.

So my question is what video card/tv tuner would the knowledgeable
members of this forum recommend to output live tv to my 27" Toshiba
yet still have the power to play some of todays more demanding games?
I have read through many of the posts on this forum but find it all a bit
overwhelming as I am a noobie when it comes to this.

Here is my current setup:
MSI K8T NEO mainboard
AMD 64 3000+
512 mb DDR 300
Onboard sound
40gb seagate 7200 rpm
80gb seagate 7200 rpm
LG 4048B DVD-RW
ATI Radeon 7200LE (no tv out, plan to replace)
Windows XP Pro SP2

Thanks
PS I would like to keep total cost at around $300.