no need for drivers, as the copperhead stores the config in the internal memory. i just dual booted windows, installed driver, configured 5 profiles (hig to low sensitity) and saved them to the mouse and now i can use them under linux as well... (or any other computer) without the need for drivers (pure linux drivers will arrive at early 2006, at least a guy from razor said so...)
one can also change dpi while using the mouse via the side-buttons (nice feature, i work at 1000 and play at 2000 dpi, just 2 clicks to change)
and what's good about cherry keyboards, that's a good question: perhaps the gold-contacts or the soft-click-technic inside the keyboard. yeah, they are really generic, no specials, but it love them for writing, but this is purely personal choice i guess

the copperhead instead, has nothing to do with personal choice, it's just the best mouse one can get for money (at least for now...)
greets