[mdrobc13]

Go for an M3 sedan man. Tons of space and power all you need to go with that chassis. Add to it that there's a new one coming out in a few months in the new format and you'll get a very good price for sure! You can wait for the M4 to come out too as I am sure it will give you enough space as well. However f10 5 series? I don't know if just you and your girlfriend comprise enough space to fill it! LOL Do you have pets or something? I'd go 3 series and then seek to upgrade to a 5 series later on IF and when you felt you needed not only the space but the increased cost of owning the larger sport sedan. You seem pretty well set up financially so why not save some $$$ and invest it and get the smaller but equally powerful=fun M3 vs stepping up in both power/price right now? You guys sound pretty young so you have tons of time to upgrade.