After much research, I purchased the Peg Perego Twin Aria. It is great for in and out of the car b/c it only weighs 12 lbs. and folds & opens very easily. My sons are now 2 (3 in May) and 4 (5 in August) and have had it since the youngest was born. They weigh 29 and 39 lbs respectively. The basket is easy to get to and huge. Both seats recline which my older son still likes. It has small trays for the boys though no cup holder. Sometimes getting it through some older,narrower doorways can be tricky, but we've learned to manage. It is no wider than a wheelchair.
I don't know anything about the Zooper, but I didn't want a tandem stroller for 2 reasons: the heavy weight and possible fighting over who gets to sit in front. The Combi was easy to fold and lightweight, but the seats were tiny. The MacClaren did not have easy access to the basket and was more cumbersome to fold.
Like one of the other mom's said, if I could have two, I would like the mountain buggy or other sturdy jogging stroller for around the neighborhood. However, the Twin Aria has suited us well. Good luck!