Are you an avid gamer looking for a feature-rich and reliable gaming mouse that also happens to be wireless? Logitech's G700 might be worth a look. At around $85, it's not cheap, but it does offer a plethora of customizable buttons, the ability to go wired if the battery dies, and also supports a super-high 5700 DPI.
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