No probs Stu - I wouldn't even pretend I know as much about cars as you and like I said I wasn't trying to be a scaremonger or "tarnish" the fun of your new motor.
Just a few things that I know are common problems on the E36 and the work of minutes for someone in the know like your self to check over just for added peace of mind or to flag up for future observation.
Sounds like you should be alright on the engine - it can affect cars still but is less common as the damage was done some years back as fuel is now all low-sulphur I believe. I think it was the Stanlow refinery that was the worst culprit and hence garages in the North West. That is why some cars survive with Nicasil liners OK.
Hope Nicole enjoys her driving