I use reef crest. It really depends on what your goal is on flow though and how many pumps you have etc. Having a wavebox on my tank, the vortecs are used for linear flow and chaotic flow, so I want them to give as much variation as possible. Folks that use a single one would probably want that kind of flow as well, but if you have more than one, you can use one for wave and one for flow etc or to create all sorts of combos using the wireless and counter-flow options.
Depends on the livestock too.. if I had a single pump and a mixed reef, I would do reef crest or pulse, but if I had more of an SPS tank, I would do direct full power and just let the rocks/glass take care of the chaotic flow.