[Dean]

And the spring rates for those were??? And how much did they lower it? Not to 13" I bet. And they were probably designed for the stock dampers... So how is that a valid comparison.?

So how much Preload if any is on the current springs?

Your future numbers have the negative at the wrong end for better handling, and you may think it handles OK now, but unless you have the Strano front bar, your outside tire is is lifting the inside edge by quite bit in the corners at that ride height. That is just how the Impreza suspension geometry works.

Bring it out to autocross next weekend and we can probably take pictures of it if you don't believe us.

Oh, and what the heck is the "critical damping setting"?

In general, you adjust bump to damp the unsprung weight and rebound to allow for maximum contact for a given surface condition. Unfortunately, you have a single adjuster that either adjusts both or rebound only. In either case, unless the engineers really screwed up at Megan, it is unlikely you will find spring rates that match the Megan dampers better than the ones that came with them.

I wouldn't spend any money trying other springs on them.