Hi, i am a new member here. I am planning to buy an used BMW. I have selected 3 options. 1. 2011 323i or 325i E90 2. 2009/2010/2011 525i E60 Which one would be more reliable and less prone to engine, transmission or other major parts failure ? As they are already a 8 or 9 year old car. I will keep this car for 5 to 6 year with me.