I've got the Sport, and TBH I'm thinking of upgrading (so you guys are all on the right track). Don't get me wrong, I love my P&T's, but I find the brake a HUGE PITA on the Sports - plus I walk an exuberant doggie, and I'd like to be able to put the brakes on quickly & easily if possible. I'm tossing up between the Dash & Vibe also (will sell my Sports second hand I think)... leaning towards the Vibe because
a) s'one in my mother's group has one and it looks awesome and
b) i like the fact you can fold with the doubles kit on. I figure you're juggling enough as it is, make it more convenient.
c) sounds like the brake is better also (from reading this thread!)