i generally use transdirect - they have a range of options some including insurance & you can quite easily speak with a real person should you have any issues.
e-go are well priced but if you have a problem it is email only & good luck getting a response out of them, my last consignment with them was destroyed and it took around two months to get it.
barnetts are good for larger freight - 4m plus
I have heard a few people use pack & send, i havent used them.