Many riders still fall into either the Look or Time camp. The two pedals feel notably different and in the case of Time it's the float and adjustability that sets it apart from the Look models.
If you suffer from knee problems or just fancy using a pedal with a degree of freedom, the angular and lateral float of the RXS will make an excellent performance choice. With ±5° of angular float, 2.5mm of lateral float and lateral offset adjustment, these pedals feel spot on if you're sensitive to positioning. The low stack height also imparts a good sense of power delivery.
The Titan tops the RXS range and its high price reflects the exotic material and low weight. The composite body runs on hollow titanium axles and even the engagement mechanism is titanium sprung. The composite wears well and the cleats aren't as slippery to walk in as Look's.