I took up origami a couple of months ago as something to keep me happy and occupied while I'm ill off work. I worked my way through some easier books (Origami for everyone, Boursin, and Essential origami, Biddle and Biddle) and then, rather optimistically, started on Lang and Weiss's Origami Zoo. I've quickly realised that the 6 inch paper that I was using for the other models doesn't work very well once you get past the easiest of these though. I tried supermarket baking paper for the lion and kangaroo, which worked pretty well but it was a nightmare to cut into reasonable squares. So, if I want to keep folding this sort of thing (I'm not sure I'll manage hardest in the book, but some have worked nicely and I've been making other things too and eyeing up new books...), what paper would it be best for me to get? Ideally I want ready-cut squares rather than fiddling around with rolls of things, and can't really afford to experiment too much with different things. I have seen origami-shop.com suggested a few times on here, and it looks great but I think it's a bit expensive for me at the moment, with delivery to the uk too.
What size paper is best, if I just want to get one pack to keep me going for a while?
Looking around online, I've found these. I guess people on here might have used some and know if it's what I want?
British Origami Society e.g. http://supplies.britishorigami.info/ind ... cts_id=141
Or Roze.com, e.g. http://www.roze.co.uk/same-coloured-pap ... 5872-p.asp
Or Amazon, e.g. http://www.amazon.co.uk/Large-Origami-P ... m_office_2
Anything else? I looked for squares of baking paper but can only find white, which I don't really want.
Some of the models in Origami Zoo suggest paper backed foil - is this essential if I want to fold this sort of thing, or will normal paper give me passable results with most things if it's decent large paper? If not, any suggestions for what/what size of that would also be great please?
Any advice would be gratefully received

Thanks
Cat