Well, first, if you want to end up with a reef tank, you do not want to use any kind of UGF, IMO. They are a pain to keep clean and functioning, since most reefers want lots of live rock--all of which sits on the substrate and will clog a UGF, and UGF can't run with sand. So, I'd pitch that out now. FOr the wet-dry--I'm not a fam of them. If you run a pre-filter, to prevent solid wastes from becoming trapped in the wet-dry they can work, but that prefilter will require frequent cleaning.
Second--you'll need to purchase fish with the intent of them living in a reef, so be careful and research all the fish completely before purchase.
Here's how I would set the tank up:
2-4 inches of sand. Any kind of fine grained sand will work, some will help buffer your water.
40-60 pounds of porous rock, with at least 30 pounds of that being live rock.
Skimmer--big fan of them, and they help maintain the water quality.
3 powerheads, one for each side of the tank and one in the middle.
A sump is a good option--place to stash a heater and other equipment.
For lights--if you want a reef, go with the best you can. That means metal hallide (2 bulbs for a 4 foot tank) and I'd get one of the hoods that has the MH and a PC for actinic lights. I would get these now, since it's easier to include in the setup than as a retrofit.
Please do a ton od research before purchasing an aneneome. Even with adequate lighting and feeding, they seldom survive more than a few years in an aquarium. Without these, they die quickly--sad for an animal that lives hundreds of years in the wild. There is not real reason to have one, other than for it's own sake, since clowns and other critters that develop relationships with anenomes will accept other hosts. The best summation of their care that I have seen is this: By the time you have the experience to care for an anenome, you realize why you shouldn't have one.
