Ok, well firstly i'll post a brief collection of what i've found so far, for anyone who finds this thread in the future:
A general guide on keyboards and mice: IT Reviews.
'The Register's' list of 12 best mice. (June 09)
Extremetech's best mice for different purposes. (Dec 2006)
'The Independant' newspaper's online section does a similar thing.
Digital Trends' mice & keyboards section
Microsoft's products page
Logitech's.
I'm off to Scan to check out some prices