I've heard that Lollipop advisors are supposed to be great aswell if you have any in your area. You can meet them and actually see and touch loads of different nappies which I am sure would help loads in the decision making.
Ebay has tons of second hand stuff up for grabs.
Can't help any more than that I'm afraid, have you checked if your local council has a trial scheme to help you out?
We can do nappy trials if you want - small charge to cover professional laundering etc but much cheaper than buying, plus if you buy them from us afterwards the trial cost goes towards the buy cost. Email me if you like, email@example.com to take it off forum.
I hired a trial pack as I didn't want to buy loads of different styles of nappies. Got loads of nappies sent to me and then posted them back at the end of the trial. Hope this helps! Went through www.cottonbaby.co.uk as seemed very cheap.
Babykind let you buy new nappies, try them for 30 days and if you dont like them return them for 70% money back. There is also a trial pack on one site called the dazed and confused, cant remember which retailer it is sorry but if you google it you should find it. Otherwise hire nappies rather than buying them or buy seconds on ebay or from nappy lady classifieds and then sell on the ones you dont like
Also next week it is real nappy week - Islington council are running a real nappy, maternity wear and baby clothes swap on Tuesday 16th, I will be there with the nappy library - it's 10.30am at Islington ecology centre.
Nappy Ever Afrer near kings cross also are doing various demos / events next week, have a look on their website too.