128i because of:
Money was a big factor. But the following also helped with the decision...
Felt it had a better clutch and shifter.
I wanted sports suspension and seats but hated the size of the M-sport steering wheel (seriously).
At the time you could option around the last point (sport seats was an option and I believe non-m sport suspension was standard) but finding a manual, used 135i CPO car that matched this profile in Toronto around 2009 was impossible. There was an SGM 128i though and the rest is history...