I am thinking about getting a 525 series cuz I don't want to spend too much and I only need the basic things in a car. One awful thing about the 525 is the wheel. I noticed that the E60 2005 525 looks are amost almost totally based on th wheel. Put a smallwheel on it and it looks awful Put the wheel that the 55 has on the 525 and it looks beautiful. I was thining about getting the 525 and puting bigger wheels on. Has anyone seen someone put 545 wheels on a 525? Also, putting bigger wheels on a 525, would i need to do anything else to the car so it can accomodate the new wheels, o do I just buy the new wheels, take off the old ones, and put the new ones on and drive off. Or is there more to it. sorry i don't know much about wheels.