The ASUS Maximus III Gene is a reasonably priced microATX motherboard that has loads of features for both normal users and overclockers. It was designed with overclockers in mind which is visible in the board design, the included software, BIOS options and performance that can be reached by some tweaking.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips