Thanks for all the replies.
I have come around to the idea of not driving the GTV when there's a good chance of parking it in the ditch!
. So I am going to forget about the all season tyres.
So, listening to the advice, I've trawled the tyre review sites and for me:
For price/reviews ( small sample) it would be the Vredestein contac 5
For price and declared ratings for fuel economy, noise and wet performance ( no reviews apart from on here) it would be the cooper Zeon cs6
For wet performance ( and forget about the price) and reviews it would be Michelin ps3
So, seeing as I'm not sure I would even notice the performance differences for the money I think I can forget about the Michelin.
As I have had coopers on my jeep before and never had issues with quality etc. the coopers win but I can't help feeling I would be doing the car a disservice for some reason so I am now leaning towards the Vredestein.
Still slightly perplexed but hopefully I am closer to a decision.