An Ending (Ascent), Always Returning, Deep Blue Day or Silver Morning would work.
Although one of them is in the scene in Trainspotting where Renton dives into the toilet, you might not want that one.
( ArthurTheRat, Sat 13 Jun 2009, 13:02, archived)

Or some Sigur Ròs.

( ArthurTheRat, Sat 13 Jun 2009, 13:04, archived)

I quite fancied having some Ennio Morricone, sort of brooding opening, then the doors burst open as the strings kick in
and my sister walks down the aisle.
( magnum, Sat 13 Jun 2009, 13:06, archived)

Thanks for the suggestions Easty
Sigur Ros would be a good choice.
( magnum, Sat 13 Jun 2009, 13:06, archived)

Happy to help.

( ArthurTheRat, Sat 13 Jun 2009, 13:08, archived)