OK, so I just got some Mandymac nappies to try and also have ordered a baby Beehind, but obviously need to get some covers for them. I'm so confused about which ones to choose! I'm hoping all you cloth veterans will be able to answer some of my questions (please!)

If I get the PUL ones, are they waterproof?
If the wool ones aren't, why would I choose them (apart from the fact that it's a natural fibre)?
Will the fleece ones leave the clothes damp?
Are there any that you would particularly recommend?
Is it worth it to buy pockets and covers or should I concentrate on AIOs? - I mean from a $$ perspective.

I think that's all my questions for now... thanks in advance!