Pack 'n' Send is another option. I gather they will be more expensive, but they will also be more careful than the average courier company. Ask MarkC about them as he uses them to send stuff around the country.

In my business we have used Couriers Please and I have never had anything arrive damaged, but have had boxes arrive with holes and bruises and other general damage from being knocked about. Admittedly they did not have big warning messages on them about fragile, top load only and so on!