I had a 520 e39 tourer auto and it was superb in every way I now have a 520 e39 saloon auto and I am looking around for another tourer,I think you will find the 3 series a little small but the mechanics are almost identical.ABS module tends to go on all models eventually its no big problem, look for one with a good service history and check to make sure its correct there are plenty of specialised garages and spare part suppliers by the thousands .Have a look on the various BMW forums for a better feel for the cars, don,t be put of by the radio cassette this can be changed easily I have a Sony usb dvd radio with a multi player fitted,autos are worth more than manuals there are so many different options on the list its hard to find two cars alike mine has a heated steering wheel and no heated seats ,10 air bags ,fully functional steering wheel controls,first aid kit under the passenger seat and angel eye headlights.Out of al the options I would say the angel eye headlights are probably the most useful option as the lenses on the standard lights tend to scratch and go very dull,take your time there are hundreds out there you will not be disappointed .

I've got an '02 325i SE Touring (wanted a Sport but this appeared at a Trusted dealer at the end of my road at the right price). Ive had it about 20 months and done about 20k miles (now 83k on clock) and touchwood it has been excellent. I'd echo looking at the history closely. I've done oil changes and had to replace two tyres on the rear but nothing else.

It has been an excellent purchase, I find it big enough for my needs. I have a Springer Spaniel but more importantly my sons mountain bikes go in ok with a rear seat folded, along with the football training equipment Im, always carting about. Sure if you want the ultimate load carrying it wont win any prizes but for convenience and a flat load bay its great. Also even on the softer SE suspension it still corners surprisingly well.