I have four kids ranging in age from 14 to 2, plus an ongoing daycare. Let's just say I have purchased my share of strollers. I LOVE the new quattro double stroller. It has many of the necessary features. I have a single quattro for my daughter now and it is by far my favorite stroller ever, Even the pricey ones just don't have features american women prefer. It is ergonomically designed so tall people like me, and at least your husband can comfortably push it around. The option of an open seat in the front makes a 2-3-4 yr old feel like it's his "lazy boy" seat and not a strapped in stroller. Many kids after about 2 1/2 don't like to be put under a "bar" because it reminds them of being babies. It is a big stroller, it is bulkier than a lightweight combi, but if you have the room and don't mind using your muscles for just a few minutes each day, this one is great. the infant seat fits really nicely and, being the car-seat guru I am, the Graco Safe seat is one of the best infant seats you can buy because it is deeper and allows for an infant to reach 30 pounds and still remain rear-facing. I can't remember the height, but it is a whole lot better than most of the others. We have always been told to forward face our kids at 20 pounds and a year, but that is dead wrong, your child will always be MUCH safer rear-facing as long as possible, so when choosing a car seat, make sure it has a high weight and height limit for rear-facing. I babysit 4 2 yr olds, includin my old, they range in size from 22-34 pounds and they are ALL rear-facing. I dred the day I HAVE to turn them around. Hench another reason to love this stroller. Check craigslist, I see them all the time, rarely used for about $150...sometimes with the matching seat. Some smaller framed women complain that it's too bulky or they didn't check to make sure it fit well in their cars, so they sell them for up to $100 off.
I recently saw a new stroller, it was red and had adjustable seats like the really expensive ones, i don't know what it was called, but if you search babiesrus.com, and click on the double stroller link, it's the first one on the page. It is WAY cool. I haven't driven it, but saw a woman with it at a festival and she was about 9 months pregnant with a 2 yr old in the front. It had a bar to attach your car seat and could also use the second seat. She manuvered it with easeup hills and through sandy patches of dirt, it was HUGE though.
Good Luck, and rememberm you little one will insist on getting out of that stroller and walking and even though you may want to let him stretch his legs and walk with you, you will find yourself chasing a two year old while trying to drive a double stroller with a screaming infant inside, always decide before you start walking where your older child is going to be, walking or riding, then stick with it no matter what sort of fight he puts up. I recommend some walks around the neighborhood to reinforce to him that regardless of the fit he throws, he IS going to ride when you say so, that way when you are in public, he will be past trying to thrown a fit. good Luck