Butcher, thanks a lot for that reply. Exactly what I wanted to hear! I'll be looking at bushes next if I'm still not quite happy with the car. ARB's are at the back of my mind, but I think I can resist that for a bit longer...
One of the things I love about the zed is the ride. I went 6 months without driving it and had forgotten how compliant the ride is. Like you say, I don't want to compromise that with the coilovers at the lower end of the market. Bilsteins seems like a decent compromise, hoping for a bit more control on A and B roads without destroying the ride.
I'll feed back my feelings once I've got them fitted. I've been wanting to try some decent quality dampers like Bilstein on a car for a while now and this seems the perfect opportunity, the standard damping just feels a little too soft at speed. I also like the idea of non-adjustables. I assume the chap from Bilstein has a better idea of setting up dampers than I do. Or at least I hope so!
Tarmac, cheers for the offer, but I've got my heart set on the Billies now!