double buggy recomendations please

I am looking to replace my phil teds navigator with a new double. i want something that i can transform into a single. i want to get away from air tyres as i always worried about punchures. it would also be helpful to be able to add a buggy board on when its in double mode if possible and finally we have down sized our car so its needs to fold compactly.

i am looking at the zezu tandem. has anyone got one ? are they good. i am also looking at the new phil teds dot as it doesnt have air filled tyres.

recomedation would be gratefully received

thanks sarah