Nemo, Solarfall is right on. You CAN keep a nice tank with canister and HOB filters, but you have to clean them so frequently that it's probably not worth the hassle. And if you slack off and get lazy about cleanings, it's really hard to get your nitrates back down once they have shot up.
Live rock and a protein skimmer should handle all your filtration needs.
PCs are not a good lighting solution for a 75 gallon tank. They just aren't strong enough. Again, like Solarfall said, a set of T5s would be perfect and would allow you to keep anything you wanted.