Twin Help

Ke
Hey all!  I'm currently pregnant with fraternal twins and have been working on my registries.  Problem is, I don't know everything that I really need.  We live in an apartment so there isn't a whole lot of space.  I have two Rock 'n Plays on my list because I've heard so many rave reviews about them, but then do I really need bouncer seats?  I was planning on getting one swing, and one exersaucer, but will that be enough?   Suggestions please!  I'm focusing on play items, not cribs and the like.  Thanks!!