Car Seats and Airports

Does anyone have any good insight on making the process of using a car seat in an airport any easier? I've seen a few options out there. The Cheeky Monkey Back Pack (see fig 1), The GoGo Baby Kidz Travel Mate (see fig 2) and the Sit and Stroll Car Seat Stroller (see fig 3). From what I understand, the Sit and Stroller isn't a very good car seat or a good stroller. The cost doesn't seem worth it, either. So, I'm down to the Cheeky Monkey or the Travel Mate. Which works best?

Fig. 1 - The Cheeky Monkey Back PackFig. 2 - The GoGo Baby Kidz Travel Mate

Fig 3. - The Sit and Stroll Car Seat Stroller