ripper,
Welcome to the Board.
The best advice I can give you is: read, read, read, and read some more. There's lots of good info in the archives of this BB. If you prefer books, there are lots of those as well but I can personnaly recommend "The Conscientious Marine Aquarist" by Henner(I think).
Your tank set-up will depend on many different things, the most important of which will be (1) how much money you have to spend, (2) how much room you have for your set-up, and (3) what you decide you want to keep in your tank.
Once you have a vision of what your tank will look like, write back with some more specific questions.
Good luck!
Jim