I have to disagree with the few comments pointing you away from your lfs. I'm not talking about the big box stores. But look for local saltwater retailers around. Just go there, look at their display tank, look at their fish, their coral. Just look, if any customers are there, listen to any exchanges taking place. You can get a very good feel for whether or not that particular lfs is somewhere you can turn for advice - in addition to these forums. But in my opinion the best thing you can do is get a lot of opinions and they will usually be 180 degrees different from each other, just as I'm suggesting you use the expertise of lfs while others in this thread have said not to. Ultimately you need to take all these opinions and make the decision(s) you are most comfortable with.
In addition to the various forums, and look through lots of them not just the New to Saltwater... one. Looks at some of the vendor's forums - I very much enjoy reading the postings by Unique Corals for ideas (and just plain sanity checks).
Lastly, to be a bit contrarian again to some of the suggestions already posted I would suggest going as big as you can. In my opinion some of the "problems" that can occur like algae build up can be controlled much better if you have a tank that will allow you to purchase a tang or two to help keep algae under control. With a smaller tank you're left to various cuc and other remedies that might not be as effective. But again, it all depends on what you want the tank for (fish, corals, both?), and how much you can afford.
Good luck.