I've got a Logitech MX1000 at the moment, and it's the best thing I've ever used. Sadly, the left button is becoming unreliable (think it's just plain worn out) and I need a new mouse. The only problem is, I can't get the 1000 any more, and even the 1100 is scarce to the point of extinction. The closest thing I can find is the G700 and that's ridiculously priced at £65!!
So... need suggestions - doesn't matter if it's wired or wireless, but it must have lots of buttons