I've always used Times and have never had a problem. Rode Looks for about six months, then switched back to Time. For me, the Looks always seem to develop a small amount of play fore and aft in the attachment with the pedal, so that each pedal revolution gives a clicking sound as the cleat slides back and forth.
Don't buy a pedal (or a saddle) based on weight, unless you're going to be racing up Alpine passes on a daily basis. Besides, the new Time pedals are as light as any other platform-type pedal out there.