As you can probably see from all the above posts, SPS are a new ballgame in coral keeping, and if you have no experience (or even if you do) you probably would benefit from a lot of reading and very careful monitoring of your parameters. SPS are generally more difficult to keep, or at least keeping good, until you get your tank spot on. I have a lot of SPS that are growing well, but I still lose one occasionally, and find it hard to keep certain species for some unknown reason, like digitata.
As Mysterybox said, you will probably benefit from high quality test kits. You can also use an ELOS phosphate and Nitrate kit to get better resolution. Not as good as the ones listed, but probably good enough, and much cheaper. They are available online or locally at Einsteins Aquatics.
IMO, for SPS, you should be very familiar with what your Alkalinity, Nitrates, and Phosphates are at all times (aside from the obvious salinity, ph, temp, etc). Obviously there are more things to be concerned with, but get these in order first, and you can work on the others as you go.
Also, very good tank housekeeping will help, such as consistent waterchanges, equipment maintenance, etc. There are obviously trace elements made available when you do a WC that the SPS can appreciate.
Just throwing that out there, and perhaps you already know all this, but it will greatly help you keep SPS successfully. Other than that, it is just a learning curve. Dont get discouraged if you lose a few. If you were a little closer I would gladly run some tests for you. Perhaps someone nearby you can take a look and do some tests. Sometimes the secret is just 2 heads instead of one.
