[onewhippedpuppy]

I agree with Kurt, but obviously you seem concerned about your neighbors. So, I agree with the used 5 series. Lots of car for the money, and since you obviously have at least one older child, she can actually fit in the backseat of a 5 with comfort. A 3's backseat is ok, but I wouldn't want to spend much time there. You can easily find a E39 528 for under $20k, and a nice 540 for around $20k. Upwards from there depending on how new you feel you need.

Tom has the best choice of all, but a nice E39 M5 is still upwards of $30k. Nice call on the debadging though, I love a sleeper!