Pick reefs

I just got done setting uptown new 75 FOWLER and my 21 reef is filling up quick so I thinking of a new tank already. I'm really interested in pico reef and I'm up for the challenge, but having just set up a 75 gallon tank im a little low on money and was looking to keep the whole setup (not coral, fish, rock, and sand) under 200 dollars. I have seen many options and liked the cad lights, Eco pico and want to know of other options. I'm not putting lots of high light corals maybe on piece of birdsnest at the very top the rest being softies. Sorry for the bombardment of talk but I also saw a nano box aio tank was wondering how much $$ that was and how good it is