1. Is it okay to change the rear first and later change the front shocks? Or do both F and R need to be changed at the same time?

2. Although my shop recommended Bilstein HD, my budget dictates that I go for something less fancy. (Besides, I read mixed reviews about the HDs here.) I'm looking at KYB, Sachs, and Boge. KYB seems to be the cheapest of the three. Is this a good brand? If so, what particular model? The last two, I'm told, are actually the same shocks. FCP's website says that Sachs are made in Germany whereas Boge is made in Mexico (?) and Turkey. I'm looking at the Turbo Gas model, as it seems most people here recommend it over the Automatic model. So, KYB, Sachs, or Boge?

3. Should I get the four TA bushings changed as well when changing to new shocks? If I remember correctly, I read somewhere in the archives that there is a bushing that the springs sit on, and when it goes bad the result is a sag. There seems to be a very slight sag on the rear driver side bumper. Maybe about 1/2 or 1 inch difference when I measured it and the passenger side.

Some useful info: car is an '89 245DL with either original shocks or aftermarket Monroe shocks (I don't remember but black shocks in either case). I have front and rear iPd sways plus a CT strut brace. I'm not an aggressive driver but I am looking for some performance but most umportantly comfort when deciding on shocks. I can feel every road reflector marker. I'm not sure if that's due to bad shocks or not. Anyhow, I just wanna get my research done before I really need new shocks stat! Last time I was at the shop, the tech guy said my car is due for some new shocks.