My bottom is bare right now! Oh wait.. was that TMI ??
Actually, I am a sand person too. I tried bare bottom for a period of time in my previous 90 gallon and loved it. However, when I set up my new 150 I found all that bottom glass lacking something so I put in a sprinkling of sand. I like the look of both, but in my current tank I just preferred having sand.
If you have the correct configuration with the tank, aquascaping, flow equipment, etc, you can maintain a decent amount of flow without blasting the sand bottom. For example, powerheads like the vortech have a nice gentle wide area of flow which is great for corals and won't blast your sandbed. There are lots of great SPS rich tanks out there with sand bottoms. I wouldn't personally suggest that every SPS tank needs super amounts of flow. Good quality flow is key, not necessarily lots of flow. It just happens that a lot of times to achieve the proper quality of flow, cranking up the amount of flow follows, but is not always necessary.