I'm going to be on the look out for something like a Metzler Marathon when it comes time for new tires but I like the look of the stock Pirellis. But for a relatively light motorcycle they are definitely a short life tire.
To give you an idea I had sold a 2007 Kawasaki Custom 900 to my neighbor and it wasn't an extremely heavy bike but heavy enough. Before I sold it I replaced the rubber with the above tires at 11K miles,
He now has 24K miles and the tires are still in amazing condition. Personally I am tired of replacing tires at 3-5K miles even with their performance gains relative to a harder compound.