How do I know when I need a new clutch?

[agnyc1]

Hi guys.

I just had a mechanic tell me that I need a new clutch, while I was getting my front brakes done.

And while the clutch is definitely toward the later part of it's life, and it is engaging towards the top of the pedal range and softening a bit, I don't feel anything slipping. It still seems to grip really well.

On the one hand, I want to go ahead and change it to avoid possibly doing any damage to that very expensive fly wheel.

On the other hand, I feel like I'm wasting money if it still has a fair amount of life left in it.

Any expert opinions to help me decide what to do?

How do I REALLY know? (Any road tests I can do, or visual checks?)

Much thanks!

-Anthony
2003 Boxster S

Oh, and I'm at 49K and the clutch was changed once already at 22K by the PO according to records. I have to do mostly stop and start city driving unfortunately, but I do generally shift gingerly and treat the clutch and tranny well.