I've heard rave reviews about the Conti 5's, but wear wise they seem to drop off heavily at around 12,000 miles.
I'm using the Avon ZZ3's with rim protectors, they've done 10,000 miles and have 4mm tread left, so I'll probably get 15,000 before I change them at around the 2mm mark.
Apparently Verdestein Ultrac Sessanta's are a great shout for heavy hatchbacks, reasonably priced and easily good for 15,000 miles.
