Headphones or speakers   stance: i like to hear it in my mind dood!!!:
I guess this sort of depends on what your listening to. But for the sake of argument (which is why we are here right?) I will use the example of Pink Floyds dark side of the moon.
TBH, and I know I am going to get cruxified for this I have to say that when I listen to it just with speakers on it really sounds pretty thin and uneasy.
Whereas, when i put the headphones I am really seeing the whole vision and scope of walters phycadelic epic.
But hey like I said, it sort of depends ont he album I guess!