Steve, as another prospective Zed buyer I know very little about them, having never owned one, but I know that when I do finally take the plunge and spend some of my hard-owned cash it will be on a UK car (probably turbo). This is because you can pay quite a bit more insurance for a Japanese import than a UK car (and some insurance companies want insure imports at all). Also, I have found that you cannot get classic car insurance on a Jap import, but I believe you can on a UK Zed - please correct me if I'm wrong anyone. I used to have classic car insurance on my Supra as it was a second car (you need to have a main car), and it was about 1/3 the price of a full insurance policy (limited to 6000 miles though). It might be an idea to keep your peugeot and get the Zed on classic it you can afford to run 2 cars.
Maybe you should get some hypothetical insurance quotes - just get the numberplate details and then try eg Tescos online quotes. For classic car insurance, I would recommend Carol Nash.
Be very careful about warranties as well. Find out which company it is and do a search on google to try and find some feedback - some of them are not so keen to pay out when something goes wrong with your car....! Bear in mind as well that the car dealers make a lot of money on them.
Good luck!
Ben