FYI, I got 10K miles out of my stock BT-020's and never had a problem with them (lots of owners think they're crap, but I liked them).
After going with BT-016's (almost 6K out of them), I've now got the new BT-023's and I'm LOVING THEM. I've got almost 1K miles on them, a majority of that in the twisties, and you can't see any squaring off at all. Of course, if I were mostly commuting, you might, but it's doubtful. These things look like they're gonna be just as long-lasting as the 20's, but with better grip. I've pushed them hard and they won't slip at all.
While the Pilot Road 2ct is a GREAT tire, there are others like the BT-023 that, IMO, are just as good for a lot less money. I got my set during a sale at JakeWilson.com for $187 shipped (that's dirt cheap for this type of tire).
If you want high mileage, you need a sport-touring tire, not a pure sport tire. Sport-touring tire technology has advanced so much in the last few years, to the point where they're really the smart money choice if you're looking for sticky vs. mileage.
Just to note...
Sport tire:
Michelin Pilot Power 2ct
Michelin Pilot Pure (new this year)
Bridgestone BT-016
Sport-touring tire:
Michelin Pilot Road
Michelin Pilot Road 2ct
Bridgestone BT-020
Bridgestone BT-021
Bridgestone BT-023 (replacing the 21)
The BT-020 is still available, but they're way overpriced for what you get. The fact is, you can get a much more advanced sport-touring tire for less $$$.