Calling All Mommy's!

Since I will be able to start shopping for baby soon (yay!) and creating a registry, I wanted to get some opinions on what is the best baby gear out there. I have absolutely NO clue what the difference is on most of this stuff-- and the options are endless it seems like. 
 I need some experts opinions!

WHAT ARE THE BEST:


Pack n Play? (baby will be sleeping in one of these in our bedroom for the first little while)


Car Seat?

Swing?


Stroller?


Crib mattress?

Any other random baby item I DEFINITELY need or DONT need?

I know a lot of you see my posts on facebook so feel free to comment on either site! :o)