got my Logitech G5 recently, very happy with the performance. Previously, i was using the MX510.. G5's laser tracking 2000dpi sensors, dpi switching-on-the-fly, adjustable mouse weight (or you can leave out the weights and make it super-light) brings it on par if not better than the best Razer out there.

But i feel that the Logitech's build quality wins it for me, also the Razer Copperhead felt a bit small on my palm (although i have an average sized hand). It doesn't have the fancy colored lightings, but hey i use the mouse for gaming not to stare at it

i bought my G5 mouse while i was in Taiwan recently, that was how i had a 'test drive' of the latest Razer Copperhead also..

got mine for around RM230. Locally, i think the G5 retails for around RM299 but i think you can bargain the price some more.. or maybe check out the Bulk section..