M3 or you'll always regret not getting it, hang on until you can afford what you really want.
I had a 335i and it was a nice car, but definitely not an M. I had also injectors and HPFP replaced multiple times. Initially I was hoping to keep the car for a while, but with these problems I got rid of it after around 50k.
2015 M3 6MT | Yas Marina Blue, CF Roof, Cloth | Adaptive M Susp, 437M 19" Silver | Stripper
2013 X5 xDrive50i | Carbon Black | M Sport + M Perf, 333M | Loaded