Coilovers Options

[JamesJ]

Hello All,
I am researching a rear coilover setup for my car. I don't plan to do any auto crossing, but would like a nice canyon carver. From previous threads on this site, it seems that 140/150 lb. rear spring would be good as well as removing my rear sway bar, installing a larger front sway bar(perhaps one or two sizes up from stock), and keeping my stock torsion bar.
I currently have Koni sport shocks all around. It appears that my left rear shock is leaking, so I am thinking to go ahead and get two new rear shocks. If I get Bilsteins for the rear, should I change out my front shocks to match? Do you prefer Koni adjustable or Bilsteins? Is the damping control of the Koni necessary for a street car?
Any experience with the different coilover setups from Ground Control, Elephant Racing, or Tarett Engineering?
For springs, do you prefer Eibach or Swift or another brand?
I am not sure why, but Elephant Racing uses a 2.5” rear spring, while Tarett Engineering uses a 2.25” rear spring-both are Eibachs.
I don't think I will need a helper spring for street use.
Any thoughts would be appreciated.
Thank you.

[JamesJ]

Many thanks to everyone for responding.
Some very different opinions/experiences/preferences but I appreciate all of it.
I have a stock sway bar and torsion bar up front. I believe stock torsion bar size is 17.9 mm and the front sway bar is 15mm.
My goal as stated was to have a canyon carver, something 45 years old updated with some modern engineering in order to have a little more spirited street car. I have driven my car through the canyons in stock trim and I don't think it oversteers or understeers, and it does perform nicely, just wanted to take it to the next level and no more. I realize that bigger is not always better, but as some of you have implied, perhaps a little stiffer could be, well, a little better.
After I posted this, I found out that there is 125 lb. spring available. Perhaps without changing the front torsion or sway bar, this might be a next level option for me.
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