Have you got a pic of your tank to give me an idea. And have you removed your lps or softies. Or just lowered them downI just got into SPS as well. First I made sure I got some of the easier SPS frags to take care of such as montiporas. Next, I was advised to segregate my corals which is what I did. My SPS frags are all in one area of the tank (mid/top). LPS are all at the lower level and my mushrooms are under overhangs to protect them from strong light and flow. It's been several weeks and everything is going ok.
The corals you have will work with SPS but we don't know if your tank itself will work with sps. What lights are you running over the tank?
Oh yeah, those should be more than enough. I would go ahead and try out a few sps.
Which sps are you thinking of trying out?
Birdsnest are one of my favs and are supposed to be easy to keep. I added my first sps about a month ago. Got an acropora and 2 birdsnest. The birdsnest are nice because they grow absurdly fast