A good article rather than an M3 comparison might be the E30 M3 against a late model Turbo 944, C4 Corvette, and maybe even a 328 for a true low end exotic benchmark. With the exception of the 328, these were very much in competition for buyers, with the M3 being the only true 4 seater. They're all in a similar price bracket today for good ones, and I assume, many of the same buyers might also be swayed one way or the other, as long as they aren't diehard BMW, Porsche, or GM people.
I haven't read an article about the E30 M3 in GRM so as a personal favor to me you folks should write some. 
This should get you started: http://grassrootsmotorsports.com/project-cars/1988-bmw-m3/
I converted to the dark side and became a truck guy between 2002 and 2005, so I didn't read a single issue of the magazine in that time period. You can either send me 3 years worth of backissues or write about another E30 M3. Choose wisely. 
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