Re: One True Mouse
The Intellimouse Explorer 2 is indeed (in my view) an excellent mouse, and I have several in use. But they do have one key flaw - the USB connector wiring cable is rather weak, and liable to break with anything more than very light desktop use.
I did pick up a batch directly from the Microsoft Store a couple of years ago, but I'm down to the last few.
My main PC has the bluetooth variant, which avoids the cabling flaw (along with the matching MS keyboard), but that has also been discontinued (indeed, decent bluetooth keyboard/mouse combos seem incredibly rare). And mine is getting rather worn (the battery covers are held on with sellotape & blutack), and I'm dreading the day they finally pack up completely.