Amazon has the Logitech MX518 for only $27.84 shipped after rebate, originally priced at $49.99. This optical mouse “does exactly that with its ultra-high resolution, 1600-dpi MX Optical Engine that delivers lightning-fast response and mirror-smooth tracking.” Product page. Video after the break.
The MX 518s advantages dont stop there. You get instant, on-the-fly sensitivity adjustment that lets you switch effortlessly from pixel-precise targeting to fast-twitch acceleration, without any software.