so many options...
we'll need a pushchair (prefer parent facing or option of) and car seat (prefer rear facing but can't do isofix)
do we:
a) get a 0+ car seat and pushchair which will also fit car seat and make it last - ds is quite average size and we could use this up to 13kg??
b) get a RF 9 month+ car seat and a separate pushchair
we love being able to transfer him asleep from car to pram but know this won't last forever.
ds is pfb, there may be siblings in the future so could make further use of a from newborn system but not necessarily
we'll have to buy a next size up car seat at some point, would it be sense to make the move now?
need something that is light and folds away easily
could do with being all terrain as we're moving to the country
any recommendations appreciated. I don't have much of a clue as the loan of a system meant we never thought of other options.
anything we get will probably be second hand - tight budget - we need to get it right first time. 
TIA x