The MSI Z87I Gaming AC is a very nice mini-ITX board with a good set of gaming-oriented features and more than enough tweaking options. It's one of the best Haswell mini-ITX boards we've tested, perhaps the best.
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