Out of all the nappies you've listed, I find Baby Beehinds the most absorbent, although I haven't tried them all. I know that lots of people on here like Sandys. In general, you'll probably find that bamboo and hemp nappies are more absorbent than cotton.
I always wash at 60 and dry on the line when I can (although some people wash at 40, or alternate 40 and 60. I recommend 60 until your baby is 6 months old for safety, in case any bugs remain). I use one Bold 2-in-1 tablet per wash; you'll find you need much less detergent than usual. Avoid detergent with softeners; Bold is fine as it's clay-based. Never use conditioner as it will coat your nappies so they repel liquid. If you do tumble, tumble on low to prolong the life of your nappies.
I do a cold rinse with a tablespoon of bicarb every month or so to strip the nappies before their usual wash. All supermarkets sell it in the baking section.
Dry pail!!! I find that stains come out fine, and there's nothing worse than fishing nappies out of a bucket of pooey water
Oh yes, and watch your PayPal - there are a lot of naughty ladies on here who will encourage you to buy amazingly gorgeous nappies - I wager that you'll have a completely different collection of nappies in a month or so