G'day Ian,
I'm using a pair of shocks on the back that I bought off Suspension Stuff on the forum. I can't remember what they're called, but they are adjustables. He stopped selling them shortly after I bought mine because a few other blokes who'd bought them were complaining about them leaking/breaking and the supplier was not honouring the warranty. However, I haven't had any dramas with mine after about 30,000klm.
I'm considering changing my whole suspension set-up to full air bag (ie: no more coils) and I would have to reconsider what shocks I get as I'd need to get ones that act in both directions; Edlebrock is the brand I think I'd need to get.
In your case, I would be looking at Konis or Bilsteins; they would be my 2 choices if I end up sticking with coils.
Good luck with it anyway,
Cheers, Roachie