Lucy, we tried so many doubles at Kiddicare. Poor DD was bored of being lifted in and out of them!
The problem with side by sides is that they're just too bloody wide. We wouldn't get through the front door. The only narrow one is the Mountain Buggy Duet which is for very skinny children only! DD is a slender baby and almost filled the seat widthways. :-/ She's not going to get any skinnier.
The Baby Jogger City Select is apparently unwieldy when you have kids in it. The Obaby Zoom (or whatever it's called) is too bloody long.
The second seat on the Phil & Ted doesn't recline at all (the Oyster does a little) and the second seat is more obscured by the front seat.
I didn't like the Jane Twone either!
At least with the Max they can face each other, which will give DD more space to look around too.
To be honest, not one of them is perfect, but I liked the Max better than all of them.
Apparently a normal Oyster carrycot fits on the top only, which isn't helpful!