Bill,
If you can, have the shipper understate the value at source. Keep it if possible below $2K, with associated invoice inside. Ask for a scan of that invoice so stories match. Better still, have a friend in the US ship it to you. This could save quite a lot of money.
Sheepishly, and with malice aforethought, I might suggest the VSonics are just as good, and a lot cheaper...... you can have the enclosures built by a cabinet maker if it's not your thing. Or my good friend Peter Roberts in Maroochydore, who is building one right now, might be willing to do another if you are quick.....
Rocket: That was cheap!! I recently shipped a 11.7Kg package to Czech Republic and it came up just shy of $AUD300! Someone is making money....
Cheers,
Hugh