| Well since everyone just wants to beat you up for wanting the V8, I will answer the actual question.
The E28s were all pretty much the same. I don't see why a V8 swap would make a difference which E28 model you have. I WOULD say get as new as possible, as the newer cars had power seats and such....if you don't care about power options, they are all equal.
I drove an E28 533i for 5 years. It was my DD for 3, and a track rat for 2. As a DD, the car was great. LOADS OF FUN to drive. Not too many 'major' problems. Blew up the motor, and put together a 3.7L stroker and tracked the car. One point of interest for powerful motors in E28s.....reinforce the diff. mount. I ripped my diff right off the frame after 6 months of track use....had to weld it back....I would just weld it to begin with.
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