tempted with these myself. If ever I was to go Coilover I would have to go for quality such as Bilstein :
http://www.larkspeed.com/index.pl?a=...ght-Adjustable
RB320 Billies are good but have seen a few for sale that are already suffering knock from the rear.
I think I might be getting the grease gun out for mine as the rear knock is getting worse.