Hello mate.
I now have Pirelli P6000's all round. Have found them to be really good.
I got approx 29k from the original front tyre's (which were either Michelin or Dunlops, I forget which) and about 26k from the first set of Pirellis.
The back ones were changed at that point too (approx 55k), so I now have the P6000's all round.
The Pirelli's are a good tyre, reasonably quiet on most surfaces, grip well and at mid 20k's between changes, last pretty well too considering the torque they're transmitting to the road and the abuse they get!