AsRock Fatal1ty 990FX Professional AMD motherboard for $179 from MSY
Probably one of the ultimate tinkerable motherboards for the hard core. The F-Stream app on the board allows you to play with clock speed, fan settings and energy levels as well as mouse polling rates.
Even if you dont utilise the deep config capabilities this board has sufficient fruit to handle most of what you might want to do with it.
Its not a huge saving as you can pick it up elsewhere for around the $200 to $250 mark but its still pretty good. Boards are only available at Clayton Vic, Auburn NSW, Adelaide SA and Cannington Perth MSY stores. I've linked to the MSY facebook page which talks about the deal as its not worth trying to find it on the crappy MSY site.