WOW!! that has got to be a record! You must be able to use all of the sides too(orpheus @ Sep. 03 2007,14:10) For mileage, Continental Road Attacks. Got 10K out ot each rear and over 20K out of the front. Great handling too. Trying Michelin Pilot sport HPX's right now, but 2K later I'm not liking how fast they're wearing.
On my spare wheels I have PP 2CT's. Unbelieveable grip, decent mileage so far. Not great, but fair for the grip.