B&H in NYC to England - OK???

I'm thinking of using B&H in New York, looking to buy $1600 worth of 
camera lenses. Even wioth shipping (but without import duty) I'll be 
saving around six hundred POUNDS but the quaestion is, is it worthwhile 
using a dealer on the other side of the Atlantic??? I've had lots of low 
  value stuff from the US in the past, but is it all went wrong on $1600 
I would be devastated! Anyone got any experience of B&H shipping to 
England? did you get charged import duty? I guess for such a large sum 
it's likely to attract HMC... perhaps I should do separate orders to get 
the value down and discourage them from taking an interest..

All advice welcome, and thanks in advance..

T