[MkMw]

we have 2 (at least) of nearly everything. And 4 car seats. 2 in my car, 2 in dh's. We only had 2 infant carriers when they were little, but had the extra base for dh's car. I liked it because we KNEW they were always hooked up correctly, and when we were in a rush it was really handy.

We only had 1 swing (which was o.k. because only 1 liked it).

My advice is start with the minimum you think need - especially with the expensive stuff, it's easier to add an extra something than return it. And space wise 2 of everything can be tough. Our 2 exersaucers took up alot of room in our kitchen - but were VERY handy when I was cooking dinner.