I'm running HSD Type HRs, which I've found to be excellent....they are actually OEM for a well known Jap brand of coilover (which I won't mention).

Knowing you though John, you'd be looking for the ultimate....so why not aim for a set of Ohlin's, Zeal's or something like a Cusco or JIC coilover, or something else similarly high end and well built? KW Variant 3's come to mind also.

Apart from that, I've got a bunch of Whiteline gear in my car, and I love it:

22mm front sway
24mm rear sway
Swaybar links
ALK
Front underbody brace
Steering rack bushes
Rear diff outrigger bushes

I'm also fitting up the fender braces I've had sitting on my bench for over 12 months, and I'm looking at a roll centre kit.

I believe that as it is, its the best compromise between handling and comfort...its very tolerable on the street, but it still handles sensationally.

Any more work on it and I think it might become too hardcore for the use of the car, which is a well tuned streeter.