Help! Looking For Alot Of Stuff For 90 Gal Reef Tank

i havent decided on the sump part yet... . how much would one run me and what are the pros/cons of it? the light is optional at this point but when i buy one i want it to be a good one. i may start out with a FOWLR tank so the light may come later... depending on how good of a deal i can find.