What tire you choose depends on your riding style. My B56 was toast @ 2900 miles....but the front was still great. I put on another B56 so I could get a little more usage out of the front...
Got my tire @ MAW out of Boise, Id. 125.00 +shipping. I am quite sure one of our sponsors here will have a similar price though.
For me, it is about traction. I have no problem replacing my tire @ 3000 miles. Once this B56 is done, I'll change out both. Either to Pilot Powers, the new Metzler M3, or maybe one of the sticky Bridgestones...