Just to try and answer some questions asked:
Yes, I did all the work except the alignment myself. I had ditched the car into a culvert and bent the passenger control arm, outer tie rod end, and messed up the wheel bearing, so I ended up replacing both lower control arms, both wheel bearings, obviously the knuckles, the one tie rod end.
I also needed to do from brakes while I was there, so I stuck a set of GMPP drilled/slotted rotors on with the OEM pads.
The knuckles allow for more negative camber than stock, are stronger, and work with lowered cars better. My car is not lowered and I use it as a daily driver, so I'm only running 1 degree negative camber for now. I've been waiting to see what happens with the B+G Coil overs before I do any more suspension work.
The control arms look and feel better, but not much you'd notice unless you were pretty attuned to it. The stamped arms are not very good pieces, IMHO.
Now if GM would only get their new motor mount and transmission mounts released that are supposed to help with wheel hop, and I can get off my ass and figure out exactly what size spacer to use on the steering rack, I'd be all set.
Their spring sale ends May 31.