I'm new to this site also but I have owned many bimmers, mostly 5 series but also some 3's and I currently have an '88 M6, a 540i and a '90 535. You need to give more info before anyone can help you on a buying discision. How much are you willing to spend, can you work on your car yourself, what kind of driver are you, do you want an automatic or stick, new or used, sport, track or nice quiet street car. BMW's are wonderful automobiles but they are like beautiful women, they tend to be high maintenance unless you are able to work on them yourself. Give us more info and you will receive more consice info in return.
Good luck, Mike