I am running my QT/frag tank bare bottom, and I love the fact that I can siphon out all the detritus so easily.
As far having a SPS dominated tank, I totally see the benefits of BB. You can have insane flow and keep the nutrients removed very easily. I on the other hand have 2-3" of sand in my tank and can run my 2 MP40's at 100% and it doesnt kick up any sand. I have 27" tall tank so I'm sure that helps. I also had a sand sifting diamond goby for over 2 1/2 years that kept the sand nice and clean. I lost him recently and my sand still looks great. I am sure there is a certain amount of funk that builds up, but with proper flow and filtration I know it doesnt cause me issues when it comes to excess nitrates and phosphates. I dont even do water changes from the DT, it is always just from the sump.
Sand looks better no matter what IMO, and I love wrasses, and 2 of mine sleep in the sand, so I will always use sand as my substrate, just not too much of it.