oem is king
Comptech sport springs are very similar to the itr springs. I used to have them on my previous gsr and they were decent on the streets, great on freeways. You can find a used set for about $100. All aftermarket springs will fit your agx's as the spring seats are the same diameter. I wouldn't stay with stock gsr shocks unless I needed a temporary solution. They will go bad quick with stiffer and shorter springs. I recommend you also get some koni bumpstops as they help lessen the impact of bottoming out and keep it from upsetting the suspension. Eibach prokit rates are close to the itr's too. Just stay away from the sportline because it's progressive all around and your car will undulate from side to side.

Originally Posted by http://www.ground-control-store.com/products/category.php/CA=2
Ground Control uses only the highest quality springs on the market with our coil over hardware. Eibach springs are unsurpassed in quality, engineered for maximumum travel and garaunteed for life. Ground Control stocks over 175 different Eibach Springs to create the custom ride you expect.
Ok so what if i just raised my GC's all the way up (which is still gonna be lower than stock right)and kept my agx's on level 1, would that give me a better ride due to more suspension travel? Would it be close to a stock suspension with very basic, .75 inch lower springs?
MMmmkay...So try this on for size, Buy a set of TEIN Type-Flex or Circuit Masters and you will be amazed. KYB...meh they are a decent grade of dampers. But the overall performance and potential of TEINS surpass any type of OEM ITR or Type-R suspension. NUFF SAID
The OP wants a smoother OEM like ride. Coilovers of any brand will not offer that level of comfort. Not to mention that if he upgraded to Koni Yellows and mated his ground controls to them, they would outperform the Teins for less than half the price, but that is a whole 'nother can of worms I do not wish to open.
Topend, it is a combination of the springs and shocks making the ride stiff. A stiffer spring requires a higher rebound setting on the shock to prevent it from bouncing all over the place. A softer spring will require a lower rebound setting, so the ride will be much more comfortable.


