Agp hdcp video card?

I have an old 2.53 p4 with a gig of memory ive been using hooked up to a hdtv (720p). I currently have a 5200fx in there and was wondering if there are any better choices. My cpu goes up in the 90's from time to time and it seems to lose a few frames. Can anyone recommend a good agp card for hd playback (no games). The computer has a earthwatts 430 power supply.

Another alternative is getting a new mobo/cpu. I was looking at a motherboard with a hd3200 hd onboard with a new 45 watt 2.3 processor. Is the motherboard worth buying with the hd3200, or will i end up putting a video card in anyways?

Thanks

emp just quoted an excellent system for your needs..I have that same mainboard.. and I have to say it is excellent... I did however throw my 8800gt in it.. but for you it would work great.. the integrated graphics decodes HD very nicely....and the board has HDMI out along with firewire and headers for front usb, firewaire and audio at around 100 bucks.. can't go wrong... and it is the only am2+ 780g board that can handle cpus over 125W... the other brands skimped on voltage regulators...

Honestly it's really pointless to spend that much for that CPU, especially since it's only slightly faster than the one I mentioned at a $25 difference. The stock CPU fan can be low enough so it can be silent/near-silent as long as you don't OC, so noise is also a moot point. I'd go for the cheapest X2 you can find, and well the X2 4000+ was the cheapest I found on newegg.

AGP? Maybe a 3850...