All I have to say is be careful which clipless you choose if you go brakeless. I have popped out of so many SPD pedals during skids and stops. I went back to toe clips for a while before getting a pair of Time ATAC Carbons. I haven't popped out yet, and have the tension setting on "2", the second tightest setting.

I like the Time's because of the tension setting. Regardless of which type you decide on, make sure you regularly check your cleats for wear, and make sure your pedals' tension is tight.