Welcome to the Forum Darren,
There is a GTV Buyers guide at the top of this section which is well worth a read through before you go looking. Cambelt and clutch being done is nice, but there are a number of other things to be on the look out for. Some are not so easy to spot, rear bushes being one of them.
Obviously you want as comprehensive a service history as possible, but it's worth keeping in mind that the car has 87K on the clock, shocks and springs will need replacing if it hasn't been done already, along with a rake of other consumable items. I'm not saying walk away if they haven't been done, just budget for replacing these items sooner rather than later.
If this is the first GTV you are going to see, it might be worth lining up another few just for comparing and contrasting. Let us know how you get on and we should be able to answer any questions that arise.