Shipping system to UK

Hey folks,

I have a several year old system with Sonus Faber Olympica I and Ayre EX-8.  I would like to ship it to London (from the US) to use there.

Does anyone have any experience with this?  Specifically:

1. What shippers did you use?  These are not heavy speakers: ~60lbs for speakers (boxed) and ~30lbs for stands.  I have original boxes but any other tips?

2. What documentation etc. should I provide to make sure I do not get  overly charged VAT/Duty: both items are old and it would be unfortunately if the duty was based on the original price.