Can only imagine what 135i will go like remapped, I'd have to do it but then I am a 'serial remapper'.
Regarding the earlier negative comments from some of the more reputable mags we still have to remember its just the journalists opinion on the day, I found the 135i to be great fun with a particularly playful rear end, the performance was amazing with a slight edge over the 335i I suspect due to the weight advantage, regarding the looks well that old cliche "beauty is in eye of the beholder" - before anyone starts I'm talking about optical eyes not brown eyes !!
IMO Audi hold the title for best interior quality, BMW for balance and entertainment, again all depends what you are looking for - come winter I'm sure my opinion will differ