beautiful car - welcome & good luck.
while updating the cooling system, you may want to take a look into these 2 items as they are a common cause of failures and leaks...
one is between the engine & the firewall while the other is under the intake manifod & fuel rail.
also, if dont already know about it - this site is your BEST friend:
http://www.realoem.com/bmw/partgrp.d...3&mospid=47506 laslty, once you get closer to 100K - you may want to replace the timing chain tensioner - as if it goes - it causes a lot of damage...
cheers.