Very interesting that I also started with Graco & Contours few years ago because they are cheaper compare to other brands which are cost more than $1K…Spent around 1 year to do my research (reading mummies forum post, customer reviewer and so on). Let me share with my research. Since yours are twin, so Phil & teds(can’t fold two seats together), Peg perego skate, britax b-ready (great quality and easy to fold with both seats on) and others in-line strollers are out.
I believe that you have done your research and know all the pros, so I just list out the cons:
Graco is too bulky (my hubby was happy with the promotion price < $500 @ Taka baby show, if I’m not wrong, the model was “ready to grow”. He and salesman need to take out 2 canopies & tray in order to fit in his car boot ...so it’s out). It’s not comfy for both babies when grow up, it could last around 1 to 2 years. I believe that it won’t able be put in flat position for both seats. The tires are EVA (plastic) not rubber. Not easy to maneuver and babies are heavier…
Contours is similar to baby jogger city select (can face front, back…) but out due to safety reason (saw a post from US mummy complained about the seats are shaky for more than 1 inch, she called the customer service... and finally she decided to buy another baby jogger city select double stroller). The tires are EVA (plastic) not rubber…may not be easy to maneuver compare to bigger rubber tires.
So after my hubby saw Graco, he agreed with me that we should get better quality stroller. I’ve also consider iCandy, however, the seat is smaller and can only support up to 15kg. The frame is too heavy and it’s also bulky. Finally, I got my baby jogger city elite double (I have city elite single and it’s great, easy to maneuver with rubber tires, can support up to 35kg), both seats can in flat position, very comfy, can last for longer than other stroller (i.e., someone from US post that her 6 years old and 8 years old still fit in comfy in it). I had britax b-ready double but forced to sell it because have too many strollers at home. I also have baby jogger city select double (sold my 2 years plus city select double and bought a limited edition of city select). Bugaboo Donkey is also great but it more expensive.
If you really want fast & compact fold, then baby jogger city mini “GT” double is the best choice (note: no more city elite double). City select double are easy & compact when folded but you need to take out both seats. You can also fold it with both seats on but both seats must be in front facing position. Both are out of your budget but you can start with used strollers if you don’t mind. Perhaps after you research more, you are willing to pay more for your most precious babies.