Ive got a side by side pram, tandem pram and three wheeler with toddlerseat.....
I didnt like the tandem, it was rather heavy to push.So sold it on ebay !!!
I love my three wheeler with toddlerseat, but when DD#3 gets bigger, we will go back to the side by side.
Whatever pram/stroller etc you buy, you are going to have difficulties getting thru checkouts, doorways etc. Whilst a lot of stores now accomodate for this, a lot dont. Im used to walking past shops now and thinking 'nope, cant go in there.....'. You do get used to it.....