We got a huge megabuggy and while it was fab for walks in the snow from the house it was an absolute shit for anything where you needed to fold it or use public transport.
The problem is that no one buggy does everything. We’ve ended up with a few for different things - a double for now we are expecting the second, a tiny fold up for travel etc and our day to day one
We ended up buying an easywalker mosey as the day to day which I love to bits. I think for me the criteria for a good buggy are as follows:
Easy to fold - one handed if possible
Stable in forward and reverse mode
Reversible seat
Good basket
Good hood
Not too heavy.
Forget the big travel systems - you can’t keep a baby in a car seat for long anyway. Get a reversible seat buggy that you can pop the seat off and use a bassinet for the first few months.
I’d recommend having a look at:
Easywalker mosey
Babyjogger citymini / city premier ( all babjoggers are fab.)
Bugaboo bee
Nuna mix
And go see it in the flesh. Fold it - can you do it quickly and one handed? and pick it up - can you pick it up easily? Measure the back axle- can you fit it through the bus aisles etc? Can you get stuff in the basket In forward and reverse? Can you stride with it? Will the wheels work with whatever terrain you are in day to day?
It’s so tempting to go for one big one that will last an entire family but from experience, get something that’s fairly nippy and lightweight and then if and when you have another, look at doubles. Don’t buy a convertible when you only have one.