Lol, you like my pics huh?

. Thats what people refer to as a full reef setup. The first few pictures in 1024x768 are of one of the show tanks at my LFS. The keeper of that specific tank has been keeping reefs for 15 years, so dont be surprised if you have trouble duplicating his beauty from the start

. The rest of those shots are of my own tank, which you can probably replicate if you go slow and research a lot.
If you want a really stunning reef, IMO, you'll need a sump. I have seen some people go sumpless and have success but I have also seen many go sumpless and have fits with their aquarium. Might want to start researching sumps at
melevsreef.com. Your work doesnt have to be as beautiful as melevs, but having a sump is a BIG plus when keeping a fullblown reef.
As for lighting for a 55g I'd either do 4x54watt T5s, or a dual 175watt metal halide setup. If you're handy, you can retrofit either systems into a canopy for a 55g, or if not, you might want to buy a complete fixture.
Also, if you want lots of corals as pictured, a skimmer will be nearly essential. The make and model will depend if you're US or UK and if you have a sump or dont.