Some advice.
1. Read as much about the hobby before you start, particularly any beginner guides.
2. Know your budget and plan a tank on what your willing able to spend. The price of buying and maintaining tank is not relative to it's size. Meaning the cost of building, stocking and maintaining a 90 gallon tank is not Three times the cost of a 30 gallon tank. Big tanks cost big bucks. For a couple of "Nemos" and some pretty soft corals I would look at the nano tanks. 12 - 30 gallons is plenty.
3. Patience. As a former aquarist I am sure you realize that these glass cubes of water and fish are really enclosed ecosystems. Saltwater is more delicate/finicky than fresh so go slow!
One advantage of the name brand "all-in-one" nano tanks is your get 85% of the hardware your need in one box. Minor to major upgrades may be required depending on what you hope to host. Some of the bigger names are Aquapod, BioCube, RSM, JBJ. Be sure to check out
http://www.nano-reef.com/ if your interested in Nano tank. Particulary the Begginers forum.
Keith