Time Atac Pedals

depends on how much you want to spend. The more expensive ones are lighter and look nicer, that's it.

not true, the actual atac pedals have different metal that clip you in and people said to me it rubs away much quicker. So I'd say stick to rocs or aliums or the new grippers. The preference is for a round bar as opposed to a rectangular one on an atac. You can see the different shapes in the pictures below

Atac = Rectangular Bar

Roc = Circular Bar