I prefer socks. In the long run, I don't believe that letting gunk and detritus settle wherever it wants is a good idea. Since we're in the SPS forum, I think that the more you can export detritus of your tank, the more chance you have at success.
Thinking that a skimmer actually pulls detritus out of the water is foolhardy IMO. Detritus is heavier than water, and I have a hard time believing that the bubbles will get it into the collection cup. If you look at the bottom of your skimmer after a month or so, you'll see that it collects the detritus that didn't make it out of the skimmer outlet to your return pump. Many who pull their filter socks notice that they skim more. This is because the tank is getting dirtier, not that the skimmer is all of the sudden more efficient.
Aside from this, I don't need any of my snails making it into my Red Dragon skimmer pump and fouling it up either. It's much easier to pull snails out of the sock when I change it than to go routing around the sump picking them up. Socks don't take the organics out of the water, only the particulate that would have broken down anyway and caused water quality issues. I think you have to be much more vigilant in your maintenance routine if you don't run filter socks.
Again, this is my opinion. I know there are many people who don't run them, but it's far easier to be preventative with controlling water quality issues in an SPS tank than it is to be reactive.