Hi ladies!! I'm a FTM that feels like I have had to make so darn many decisions lately that I just can't do one more! Between the nursery furniture and design and the registry...yikes. Now I'm onto buying a crib mattress and was wondering your opinions... Foam or spring?? Also what about then 2 in 1 type ones that you flip to become a toddler bed?? I want something nice and comfy for my LO!! Who knew there were so many options! Any input would be greatly appreciated - thanks!!