Hi R.! Congrats on your babies!
I don't have twins (but I have a LOT of friends with twins)- but being in the baby gear business... I hear this request a LOT!
In general, the front to back strollers are going to be huge... and hard to push... The Peg Aria is tough to push - and the 2008 will be a 60/40 seat to allow for a carseat and a sibling... so that's not a great option. The other two pegs are ok - but I think for the price, there are better options out there.
They are still pretty little, so you still really need a recline. I would concentrate on something that's not for carseats... since in another 5 months or so - they won't be in infant buckets.
A stroller I LOVE recommending right now is the Baby Jogger City Series Mini Double - I use this one myself with my 2 year old and my neice who is also 2. It's a fantastic push... fabulous. Super easy to fold (you just "pick it up" and it folds). It has full recline and fabulous hood coverage for the summer. It does have two accessories that I find usefull for some - the double belly bar - which you can attach a "soft" tray to for sippy's and snacks.... and a parent tray for waterbottle, keys... ect.
It literally can be your only stroller. Now - while it is thin enough for all average doors, it's still a side by side... but it does a good job at providing a large seat for a child to really grow into without being super wide. It's good for 100lbs for the entire stroller (basket included... so that's frame weight total).
If you're on the cape anytime and want to come check it out, feel free! (you can even put them in it and push it around the block! :) )
There are a few others - but this is the most reasonably priced ($349 - but look at my ad... you'll see a discount coupon) - and the lightest/easiest to fold. It's not air tires, but the tires are big and move over most terrain great. It wouldn't be for "trails"... for something like that, you'd want to look at a baby jogger city series elite or a Mountain Buggy or a valco... but again - these are all about $500-600... and it doesn't sound like this is what you're looking for.
Please feel free to email me if you have any questions!