Puncture :( Not sure what replacement to go for?

[Tyrant]

Sorted out my binding brakes today and was looking forward to getting out. Check tyre pressures and the rear has a flat. A small piece of metal just off center is responsible

The bike currently has a Michelin Power Sport (soft) 160 60 zr 17 on the back with matching front. I was very happy with the tyre so should I go for a direct replacement or should I go for something else and change both front and back while I'm at it?

[RedexRobB]

How much tread is left? might be able to get it plugged.

[Tyrant]

It's approaching the wear indicators so I'm not sure it's worth plugging.
Though at £140 for a replacement it might be worth it for those last few milimeters!!

Does anyone know of a cheap supplier?

[RedexRobB]

have a look on ebay, im sure theres racers flogging part worns.