It depends on how you want your car to look. I love the style 42's (basically why I bought my Rondell 58's) however, the RD2's look amazing on white e34's. The style 42's give you more of a style/luxury look, and the RD2's look hot/sporty.
Because I'm biased with my style 42 look-a-likes... I don't think I can give you a good opinion.
But I'd choose the RD2's.