Hello,
Can anyone recommend to me a good motherboard that uses AMD chipsets, can support DDR3 RAM, and if possible reasonably priced?

I think Asus makes the AM3 motherboard that can support DDR3 ram..

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131366&Tpk=Asus%20M4A78T-E (i am not promoting this or endorsing this site... just giving you an example)

something like this?

searching the web.. looks like 120~150 is the average price.

i got one for you if you want amd chipset ddr3 support triple core and quad core hdmi everything i got a few off ebay and dont need this one 40 bucks