well what features does it have to have there are hundreds. Look around for an AM2+ model to ensure compatibility.
This is most likely the daddy but its not cheap
http://www.overclockers.co.uk/showpr...%20Motherboard
Do you have a newish ATI gfx if so something with the spider platform may be worth the investment
this is a slightly cheaper one
http://www.overclockers.co.uk/showpr...%20Motherboard