Ditto CheshireCat. We have a MacLaren Twin Triumph and it is across-the-board awesome. We got it shortly after my son was born and he'll be two next month. It has held up really well and I look forward to strolling him & his sister (who will be nearly 4) around WDW this fall...and lowering the recline when they inevitably pass out each evening!

First and foremost, the stroller is very lightweight and
very easy
to fold up and carry on the buses

The fabric feels like canvas and seems to breathe well (imp. for O-town heat) and cleans up well, too!

The kids can fall asleep comfortably and have the seats reclined

It is a
slender double

- you can make it through average doorways and even through shops...not
easily, but what stroller is?

It's easy to push, it has big pockets on the back of each seat and a decent sized set of mesh storage areas underneath.

It's very simple and modern looking - mine is coffee brown, which is dull, I know, but I make my own seat covers for the kids and that's where the 'color' on mine comes in.

Although you can get them, new, for around $200, you should keep an eye out on craigslist and (maybe?) consignment shops where you can get one a year or two old for half the price. Score!
So yeah, two votes for the Triumph. I honestly think the Mac TT is the *perfect* Disney Park stroller.

Good luck!