I need a box suitable for a BC sized dog, but also suitable for toy breed dogs, up to westie sort of size, so I don't know if its possible to get a box that would work for both, or if I'd need two boxes?

I want a box that is easy to keep clean, and one that can be stored easily, ideally flat pack. I want it to be able to cope with pups up to the age of around 6 weeks, but i will have them spending most of their time not in the box before then.

I am not wanting to buy one right now, mainly as they cost a lot, and i want to be sure the box i get is worth the money but i do want to start to get a feel for what's recommended so I can start to get some ideas.

This thread is a good start.
http://www.champdogsforum.co.uk/board/topic/118270.html

I saw that Its partly why I started the thread -- to find out where NOT to go as well as where to go