I love my Phil n teds - big basket underneath when used for just one - plus saddle bags on each side ($50 extra but worth i for sure) and a bag over the handle - definately fit tonnes in there - when/if No. 2 arrives then there the toddler seat - still lots of rrom in the saddle bags and can even get a bag that fits over the rear wheel axel once bub is in the toddler seat (not tried that though so not sure what that's like).
Good luck n choosing your pram - enjoy the fun :-)
Julie x