You want a
good mouse, but it doesn't need to be a gaming mouse. Higher price does not mean higher quality.
Take Razer - they make great mice, but they are absurdly expensive. You can get just as good a mouse for $30-$40.
I really prefer having a mouse with on-the-fly adjustable DPI. Mine's got a couple buttons that can change it, and I script a thumb button as a momentary drop to 1/2 my standard DPI. This makes aiming much more precise and steady while I'm holding the button down, and allowing fast control with minimal physical movement when I'm not.
For reference, I'm using a Coolermaster Sentinel Storm Advance; it was $35 some 4 years ago, came with adjustable weighting, and doesn't require drivers and such to use (all scripting and macros are stored within the mouses' flash memory).
Edit: Also a fingertip mouser. Generally, I rest my wrist on my desk, and move the mouse with my fingertips and the base of my palm. My forearm and wrist don't move at all when playing, and as (when not holding down my DPI dropping button) I run at 5600dpi, I never have to lift the mouse.
Edited by Wintersdark, 23 February 2013 - 03:23 PM.