John,
In my opinion the East German reworks are a study onto themselves. As a pistol colletor I would not use them as "shooters", I think they will be recognized as a legitimate variation at sometime in the future. (Although I will put a few mags through the gun I just picked up. I will replace the extractor with one from a "shooter" as it is matched to the gun and I don't want it to break)
I would look for a mismatched or refinished Luger as a "shooter". Here is a link to my "shooter" collection which includes a few Lugers.
http://www.p38guns.com/Shooterpage.htm
Also a link to some EG P.38's.
http://www.p38guns.com/Postwar.htm
Mark