Well, it all depends on what you want to spend. The Nano cube is a beautiful system, in looks and all round effectiveness, but keep in mind, it is sold at about 250 dollars. The traditional system is a good, much cheap thing, thats often very effective, but it definitely has its flaws. I'd recomend the tank for now. Buy a good filter, a heater and protein skimmer. get down the basics before going for the bigs stuff

In my opinion its best to get a bicycle before a motorcycle.

On the topic of what to put in, I'd recomend some damsels first, and as you get better, a long nosed hawk fish. Make sure they have plenty of reef like rock so they feel at home, or if your feeling adventerous, why not try some real corals? Beginner corals, not too expensive, just incase it doesnt work out. Also throw in some little hermits and snails, to take care of some of the extra detritus. Good luck,
~76