I noticed the other day that one of Charlies tops is 0-3!!!!!!!!!! I was thinking that it was looking a bit too small LOL
I'd definitely get some newborn stuff. I'd get a pack of vests and a couple of packs of babygrows and leave it at that though. T & C are wearing 0-3 months stuff now and they are only 8.5lbs ish so chances are your newborn would fit in them straight away. I've found that people buying gifts tend to get 0-3 months and 3-6 months stuff anyway so I wouldn't buy much of that size. You only have to wash the blummin stuff anyway!
Also newborn sizes in one shop will be tiny, but massive in another shop! Bethanie can still wear some 0-3 month stuff and she is 7 months! and some of her 0-3 stuff is teeny.