What Norbie said.
A grand will get you a Pedders/Monroe set-up, not good.
I spent about $1400 and got Koni sport adjustables all round, Lovells heavy duty lowered springs, adj. panhard rod, and new Red Ranger polyurethane bushes through-out the entire car. Also had fitted a TT142 24mm front sway bar, which is about to be replaced with a RA40GT item.
Search and Read these forums, there is plenty of info on this subject.