A break down for why I personally think you should look at both variations of the 135i.
2008 to 2010 N54
Go for 2010: Why, it’s the latest model for the N54 motor.
Power can get to monster proportions 700hp - 800hp on stock internals.
More availability for 6 Speed Manual
Amazing community, loves to be modded, and makes hp easily.
2011 to 2013 N55
Go for 2013 like before latest model for N55 motor.
Historically more reliable than N54.
Newer tech such as LCI and DCT.
Newish modding community that’s hungry for power chasing the N54
Motor also likes to be modded and MHD now unlocks DME, not a 700hp to 800hp monster potential but reliable at 500hp. For now
