If I had to choose, I would go for the DMR. It's personal preference, however I much prefer single fire than burst fire. I find that it makes me much more accurate as as long as my reticle is on target, the shot will almost always hit. 343industries adding both the DMR and BR to me is positive - they are appeasing both the hardcore fans who may approve of the BR and also pleasing those who like the DMR. I do, however, think that they will both serve different purposes and have different stats which will see players having a clear preference on which one they prefer.