I have ground controls:

They are linear rate springs. Meant for racing. I was also uninformed when I got these. You would be better off getting something with a tender spring or progressive rate spring. Tein is a great bet. Or the progressive rate eibach sportline kit (unadjustable) w/ konis.

I have 375 front and 250 Rear. I went with AGX but since then have heard that they are not stiff enough for higher spring rates.

If you do ground control. Go with 375 or 400 in front and 225 in the rear and koni struts. That should be pretty well balanced and not too rough.