modify

I'm brand new to this forum so first, I would like to say hey to everyone. I'm almost 17 and I just got my first car (an Orient Blue 325i) and currently I don't have a job so I'm looking for cheaper methods for modifying my car. I'm not a fan of the current stock rims (as pictured) but...

i was interested in getting a spoiler for my w(2000) 4door saloon. i quite like the M3 lip spoiler on the new model. would this fit? or would i have to buy the M3 spoiler of the same year? Are there any sugesstions of what i should get to set my car off.. thanks