During coutomization, if there is no statement in blue stating "This option my delay your order"... Then that option is avalible for on-time delivery, if it does say, that option may delay the whole order or only the mice will ship seperatly... Hope it helps!

 

If you are saying buttons, then you need to look at the speed of the mouse hardware. ;).

What am I looking for in a mouse spec' that idicates speed/performance and what would be the good speed.

Also, what effect does a CPU have on mouse performance

I think the limiting factor in mouse speed and performance is the hand that is controlling the mouse, not the mouse hardware.  Mice are not CPU-intensive and have a negligible effect on each other.

Well, I agree with BalaJ. Hand is the main thing on controlling the mouse. ;).