Hi A.!
Yea, I would think that trying to "shop" for a double stroller would be hard now-a-days because there is so much to choose from.
I absolutely LOVE my double stroller. It's just the Jogging kind, but it has SAVED me so many times.
When we went to Disneyland, Marine World, etc.. my 10 year old could even sit and rest in it! My youngest is now 5 and I won't get rid of it! I hardly use it anymore, but I know I would regret it.
The things that I loved about my stroller are:
It folds up easy and FITS perfectly in my van. The seats in the stroller "recline" for when they were little and fell asleep. There is SOOO much leg room, so for family trips you can fit your older daughter until she's 12! Easy to clean. The fabric dries so fast that I can hose the whole thing off!
Anyway, that's my opinion for you. Hope it narrows down your choices :o)
Good Luck!
N.