I have the Graco Quattro Tour Deluxe (blimey that's a mouthful!) and find it really easy to use and to collapse. The only thing I would say is that although I thought it looked quite big, and it is in comparison to other travel systems, it is still incredibly easy to manouver and doesn't feel bulky atall. It comes with the soft carrycot thingy but with today's weather my poor little one was baking (3weeks old) and so, like Goodsy says, I laid her down in the flat pushchair position - it has straps to keep her safe. The carseat is really good and is easy to use both with and without the frame, and it comes with lots of layers so that as baby grows she'll still be able to get use out of it, and now she weighs over 10lb it's just as well!
P.S. The cheapest place I saw it was Toys R Us