Budget Phenom II 720 build - need MoBo & GPU suggestions only

Looking for advise on my build. I am going to go with the Phenom II 720. I'm going to get a good 400-500 watt PSU. 500GB-1TB Seagate HDD. Already have RAM (DDR2 800), case, running XP, etc. I am going to stick with DDR2 board because I have the RAM already. Not much sense in blowing $80 or so on RAM when there's not much performance advantage.

I only need advise on the Mobo & GPU.
What I will like to do is purchase the GPU a bit after I have everything assembled, so on-board graphics is preferred, but not mandatory.

shopping on newegg.com.

Going to slightly overclock the CPU, but not much. Want to run stock cooler.

Use the computer for surfing, watching u-tube, web design, DVD creation (adobe premiere elements), etc. Nothing too taxing.

Kinda like to get as close to Dragon Platform as possible to maximize performance / $$.


GPU

I'd like to get the best bang for the $$. Want to stick with AMD for graphics as well. Saw a 3870-512Mb for $60 (after $10 MIR), 4670-1Gb for $60 (after $20 MIR), and many others.

I don't play games, so the best graphics card for <=$60 (after MIRs). I will be running folding @ home, so if there is anything better for this, please recommend.


MoBo

Want a 790 chipset. <=$120. Saw some nice ones with sideport mem (if it helps, great) for as low as $85. Not looking for anything too crazy.



Thanks for recommendations!

Combo deal:
http://www.newegg.com/Product/Comb [...] mbo.203011
That's a lot of board for the price.

RAM:
http://www.newegg.com/Product/Prod [...] 6820227297
You don't need 1600Mhz, but it's a good deal and should last a while. DDR3 will be around for years.

If you don't game, you don't even need a 4670. A 4650 would do.

500w would be to much, 380w-400w.

400cx psu should be good.

There's nothing wrong with buying a higher wattage PSU if the price is right.

Those are both good picks.

The Corsair has free shipping, too. Personally I would use the Corsair 450VX in a build like that.