Pat, I am not totally thrilled with the AGX's on the WRX. I put them in Style's car and I really thought they were too soft. And for the WRX they only have 4 click TOP adjustabilty. Not good. For the RS though...I love them. Maybe you could look into fitment or RS rears on an 02-up. I know b4 AGX's were out for the WRX (and b4 I got my DMS's...more on that in a sec) Teague's told me I could just run RS shocks. I guess I just need the steel braided brake lines since the mounts were on the wrong side or something.
Yeah, and DMS 40's. DON'T DO IT. I had to have mine rebuilt 4 times and now the guy who bought my car is always bitching to me about them. I guess the problem would be called "stiction". They were fine for hard driving but when it came to normal driving they wouldn't move under small bumps, but not because they were too stiff. Because in the same respect, they wouldn't return to full height either. You could pull up on the wheel well and watch the car come up a 1/2" or more and rest at the correct height. Oh yeah, and they rust really fast too not that you have to worry about that or anything.
Sorry I didn't have better news or advice, but I hope I helped.