Building a PC for DVD burning

[Jemhead]

First of all I want to say how glad I am I happened upon this site. I have been browsing for about an hour and learned alot.
So here is my story if you can take another newbie story...
A few years ago, I bought a lower end Compaq Presario, and over the years as my needs have changed I have upgraded it. I started with a new case.(everthing was so crammed in the old one and it didn't even have case fans.) I then added a few things here and there to create the following setup:

AMD Athlon XP2800+ 2.08ghz
1.00 GB RAM
Nvidia Geforce FX5200
Creative Soundblaster
Coolmaster 4 (running 2- 80mm and 2- 120mm case fans)
HP DVD writer 640c
Sony DVD RW DRU-710A
Allied 500 Watt power supply

1-120gb and 1-4.3gb harddrive

After a lot of plug in upgrades over these years I am thinking I want to tackle a new motherboard and processor(plus new power supply thanks to what I learned here...Allied=Junk)I am probably gonna wanna go with a 250 gb hardrive at least also.

I know just enough to be dangerous, so I am looking for suggestions on what to upgrade to.
I mainly use the computer for burning and playing movies and music. I store a limited amount of music and pictures, not really movies though. I don't game with it but do multi task while burning...ie: printing and surfing the web. I want something that will be fast and not bog during burns or while playing DVDs.Something that will support at least 2gb of ram possibly 4 (is that overkill for my application?)

I am looking at spending somewhere in the range of $600 to $800.

Thanks for taking the time to view my post!

[glc]

To make an upgrade from what you have worthwhile, you may need to spend more than that (you need a dual core processor and 2gb of ram - and you can't reuse the preloaded Compaq XP as soon as you change motherboards) and possibly reuse some other components (optical drives, sound card, etc.). We might be able to put something nice together with onboard video if you don't game - look at the Intel 945G and Nvidia TForce based boards. ATI has integrated video chipsets, but they are not so hot from a stability standpoint.

[Jemhead]

So am I to understand a dual core processor isn't compatible with my current video card?
I already purchased another copy of Windows XP as I was getting ready to upgrade my harddrive and was gonna wipe the 120gb one clean.
I failed to mention I was hoping to stay with an AMD processor. I am willing to spend more, as I will probably being doing this in pieces (at least buying it over time)

Thanks for the help!

[glc]

The new technology is PCI-E - your AGP card won't work. Buying an AGP board right now is a dead end from an upgrade standpoint, with AMD you will be in Socket 754 which is being discontinued. The TForce onboard video is better than your 5200.