Putter, I know a few guys that have the Progress springs. I haven't heard them complain about them. I also haven't heard them comment on a "clunk" noise from the rear springs like the Goldlines have when going over bumps. (still haven't inverted my rear springs yet to fix that)
I haven't had a ride in their cars so I can't comment on ride quality. I would imagine that they can't ride any worse or better than the Goldlines. It is going to be a stiffer ride either way than what you have now.

 

A guy on eBay has the Progress springs for $187 and free shipping...... just so you know. It's the same guy has the Progress rear sway bar......

Clicky


Any body know how those spring rates compare to stock 2LT???

 

Putter,
In case you were looking for sway bars next, I sent you a Link through PM with Eibach Front AND Rear Kit on Sale for $193.45. And placing them in my cart was about $17.00 shipping.

I did not buy these yet, thinking about it though.