I like the Magpul MOE. It is ergonomic, light, and you can add small rail attachments to it so you can still attach lights, grips, and other stupid shit off the front of the rifle if you want. As you can see on my Noveske, I am not even using the rails right now. I mentioned that I'll be adding a light to it and my forward sling attachment will be on the rails too, but that still leaves a lot of unused rail space and weight. The MOE solves this problem.
ETA: I prefer the fixed FSP, but that is just me. I have them on the 4 ARs I own. It does not distract me when I am using the red dots on my Noveske or BCM either.