Hey FBD2K3 Welcome to 3Reef.
A 90G tank is a great tank to start with. But if I may, A 90 is 4 feet long. a 120 is also 4 feet long just a bit wider. If you have the room and the money you may want to consider it.
I would defiantly look at tanks that are called 'Reef Ready' this means they will have an overflow to go to a smaller tank in the stand called a sump. this is where all you hardware like a skimmer, heaters and other devises will be. That way your tank is free of all the crap.
Yes as far as I'm concerned 'live sand' is not needed when you get Live rock it will quickly populate the sand and make it 'live'.
Clown fish are very good fish in community tanks. They do like to have an anemone, so if I where you I would plan your system based on the eventual addition of an anemone.
Hope this helps, Feel free to ask as many questions you need to
J |