In general, I go for cheaper corals, or ones I can get on swap, for free, or small frags and grow them out. They can be LPS/SPS/Softies, I have them all. There are "less" demanding / more forgiving corals of ALL varieties (SPS included), so if you can get a piece of SPS try it!
I see tanks that are SPS dominant and matured and find them absolutely gorgeous, BUT they take many years of patient and GOOD husbandry to get that way. And SPS dominant tanks do NOT appear to be very forgiving. Heat, Light, Flow, Quality of the water. A slip in any of them on a heavy SPS tank can QUICKLY result in a disaster.
Personally, that's why I prefer a mixed reef. I get to experience all kinds of corals and can do it at a reasonable level of maintenance and lower risk.