Kelly, I'm from Wheeling WV originally, just moved down here this past year. Love the outlets in Grove City.
If you are serious about getting into sps I'd buy at least 2 820 Seio's, if not the 1100's or 1500's. SPS love flow, and do much better with more flow. If you only have 600 gph now in a 75 gallon tank that's not much turnover at all, not trying to be a bummer. 600/75 is only 8X turnover, which is not enough to keep SPS happy. To give you an idea I have ~3090gph in my 55g. Which is ~56X turnover, and my SPS love it. I can still see a difference in growth between two of the same SPS located in different places, where the flow is greater, the growth of the same coral is much greater. You don't want direct flow on the coral, but lots of random indirect flow. I'd recommend at least a 30X turnover for SPS, preferentially >40X.
HTH