I'd try and drive a few more Zed's before going for one that is very cheap, just so you know what it sound sound and feel like to drive. The last thing you need is things going wrong with the car as soon as you get it home.
Oh and
But you're implying that a heavy clutch is possibly one on its way out. This was true in my case but he has just had the same clutch and fly as mine fitted. That's why I'm wondering how there could be such a big difference when both are new and are the same parts.
I Just had my an exedy cluth and fidanza flywheel fitted too. my clutch is now light as a feather!!!
Why the difference? It was serious heavy before the change
I Got mine off CS. He does the right ones that you need
I'd go for 20mm all round for the perfect look. My 25mm on the back makes the car look like it needs lowering.
I'm running 20mm front and 25mm back with no problems at all.
There are lots of people on here running 20mm all round and they are definitely not illegal.