I'm running a set of KYB GR2's (designed for the Legacy GT) on my Legacy/OB but I'm looking for something much stiffer to match my Eibach springs (340lb/ft front, 250 lb/ft rear) which are certainly too stiff for these struts. I've considered KYB AGX's but I've heard that even at the stiffest setting, they still aren't very firm. I know Patrick Olson is using the Koni inserts, but it sounds like it's quite a hassle to install them.
Are there are any super-stiff struts out there, preferably adjustable that you guys would recommend?
Also, what do you think of my spring rates? These were recommended by the guys at Ground Control, but I'm open to other options.
And finally, I'm currently using Ground Control Sleeve-Overs to adjust my ride height. These necessitate fairly short springs that sit on top of an adjustable perch. Are these hurting or helping my handling? As much as I like the adjustable ride height, maybe conventional lowering springs would be better.