I don't know about anyone else but I found the cheapest way of buying nappies, (and easiest ones to put on as my husband is disabled and has problems with co-ordination) are all in one nappies - nappies with the nappy and wrap altogether and we have velcro closing nappies.
And I always buy onesize nappies - these normally have several lots of poppers so they grow with your baby and you don't have to buy several sizes which when I was working out cost seemed expensive to have to buy two or three sizes of nappy.
I think more green as well as you only buy one lot of nappies, but appreciate other peoples views as nappy buying can become contagious and it is very personal.
However I did make a mistake and buy a bamboo nappy recently and they take ages to dry, might just be the brand (snugglebums)
I use bumgenius all in one onesize nappies and a fleece liner with a prefold as a booster for nightime.
For change times I use fleece and terry washable wipes that get washed with the nappies and a water spray with lavender oil.
I have to agree that thenappylady is the best place to start, also do you have a local nappucinos so you can see different types of nappy.
Hope this helps,
sarie