Just my two penneth...
I've had 255/35 20 inch tyres Nankang NS2s on my car for over a year. Quiet tyres and good wear too, tyres were around £120 each. I've always had major brand tyres in the past but I honestly can't see much difference. It makes for a huge saving when other manufacturers start quoting £250-£350 per tyre.
http://tinyurl.com/A8-tyres
Cheers,
John G