We had three double strollers and three pairs of carriers. Guess which we used and loved more . . .
Which is not to say we regretted the $$ we spend on strollers. They each had a time and place. Here's what we had:
Double snap n go, purchased for approx. $35(??) at a twin club consignment sale pre-birth to go with the bucket car seats. This was a fantastic stroller for the newborn weeks. Light, slim, room for lots of stuff beneath the seats, all around awesome. But very short lived. Not great past 2-3 months. Don't buy a new one if you can avoid it.
Mountain Buggy Urban Double - bought off craigslist for something like $100. This was an amazing and beloved thing. So smooth, so rugged. We took it on the beach, on the metro, over every trerrain imaginable. It's about the size of a wheelchair in terms of width and bredth. But this sucker is heavy, and not really happy about being folded down. Which is a serious limitation. Worked best living in our garage and rolled out for walks around town.
Twin Swift Ingelsina, bought new for around $200. This was an "insurance" stroller. It lived in the back of my car, and used if I was on my own
If I had it to do all over again? I'd probably do the same. We got good stuff and used it when the circumastance we right. Strollers were good for when I was on my own or when we went out to eat and pulled the stroller up to the table while the little ones slept. Otherwise, the carriers won for ease and joy.
Doing it again, I might consider a carrier and a single stroller. Going single drops the price and weight.
PS - FWIW, the twins are our first and only babes.
Whatever you decide, good luck!