I've used:
Generic 3-button carp
Logitech Pilot
Logitech Mouseman Wheel (3 of these.... great mice for the time)
MS Intellimouse Explorer (took it back for a refund after a few days)
Logitech Mouseman Optical
Logitech Dual Optical
Logitech MX500
Logitech MX510
Logitech MX518 (current mouse)
These mice have all been progressive improvements, except for the MS Explorer, which was stupidly big considering how light it was... very chunky and it didn't respond well to very rapid movements (this was the early days of optical mice). The Mouseman Wheel was a fantastic mouse which I replaced a couple of times when it got worn out (the wheel wasn't very reliable after a while and the rollers got too hard to clean), the weight and way it feels your hand was just perfect - an excellent mouse for smooth shafting.
I suppose I ought to try and get a copperhead/G7 soon, but I'm not playing competitively at the moment so I live with the MX518 for now.
As far as pads go I used to like the 3m Precision Mousing Surface, but they get curled up and worn out too quickly, lasting only a few months. Compare that to my allsop raindrop pad which has lasted 4+ years. I've tried other pads down the years like everglide and even a teflon baking mat, but in general I find them a little too smooth. I need a bit of friction in my mousing to get a solid feel, I can then use a fairly loose grip on the mouse without having to worry about it sliding about.