I'm just going to add to the Phil & Teds (Sport) positives even though i know it wasn't an option for you.

I bought one when i had DS2 (DS1 was 25 months old) and it has been the best pram. Honestly prior to having my own i wasn't a fan of them only for their looks really but when looking at double prams it was about as much as i was prepareed to spend and still feel like i'm getting decent quality.

So for the boys it was fantastic, i could lay DS2 down and have DS1 travel on top then later on swap them around to whatever suited best. So it was great for 2.

BUT i now have another little one and still it has been the best pram, (when DD actually would travel in the pram which is a whole other story ) there has been many times when i have had all three on the pram. DS1 sitting on the foot rest, DD in the main section of the pram and DS2 in the back. The pram handles this way better than I do Good workout though So it's been a great pram in that sense also.

Not sure if you're looking that far into the future but just thought i'd point out those few things that i've found since having my P&T's. DS1 is almost 5 and still sits down occasionally, DS2 is 3 early next year and loves to sit in the back section where he can get out easily when he pleases and DD is really quite happy in the main section as long as we're on the move.

Good luck and all the best for the new arrival