There was an excellent quote from Steve Weiner (ex-RSR racer & owner of Rennsport Systems) in a thread on suspension settings on the Early S Registry :
"...There are MANY things that affect perceived ride quality and before engaging in a protracted discussion, one must understand that the operative word here is; "perceived", which means its all subjective. Aside from color, I cannot think of another aspect of ownership where "One man's tea is another man's poison", is more meaningful..... One should never get caught up in aquiring fancy technology due to peer pressure or appearance.
IMHO, the components that have the greatest effect ride quality are (in order):
1) Shock valving
2) Tires & pressures
3) Bushings
4) Spring rates (torsion bar sizes)
5) Swaybar diameters & adjustment (where applicable)
Obviously, this doesn't account for local road conditions since thats a variable that nobody can control.
Needless to say, every modification one does to their car becomes a compromise of sorts and an individual decision based on what one does with the car and how its driven. Its simply a question of degree.
I would conclude by offering that suspension upgrades are not a one-size-fits all proposition. Everyone's needs and expectations are different and people in my business ought to listen carefully to their customers so that the end result will meet or exceed each individual's objectives..."
Ian - I had Bilstein Sports F&R on my black RS-engined Targa above.
I also have experience of a 21/28 mm torsion bar combination - my 2.8 twin-plug car had the following set-up:
21mm (F) + 28mm (R) torsion bars
3.2 Carrera Bilstein front struts with 'Sports' inserts
Bilstein Sports rear shockers
Factory 16mm (F) + 18mm (R) antiroll bars
Turbo tie-rods
3.2 carrera F&R brakes
Lowered (significantly - too much ?)
Corner balanced
205/55 & 225/50 x 15" tyres on 7 & 8 Fuchs
I found the overall compromise of comfort/roadholding/handling ideal for my use/style which is why I went for a very similar set-up on my silver 911R-inspired car - the only difference being I opted for 22mm Weltmeister antiroll bars F&R.
The silver car was already lighter (grp front wings & rear bumper + carbon fibre engine lid) than my black 2.8 but I am in the process of lightening it further

so it may be that some of these settings prove too harsh ...