I have a now four year old and a 13 month old and have the Peg Perego Twin Aria.
Love it.
Both seats fully recline, both have little canopies, it's lightweight and easy to open/close. I can lift it and get it in and out of the car easily. The basket underneath is very useful and a great size. It steers easily. No complaints. We recently took it on vacation as well and all was good.
Oh...and my oldest still falls asleep when we're out for a long day, maybe Disneyland or something like that, so it's nice to have a place where he can sit and possibly sleep. It was also great at the airport to have them both confined in a safe place I didn't have to chase after them in. The sit and stand really wouldn't work for me...no place for my oldest to SIT!
Got it at Babies R Us.
-M