I should just point out (having visited Julian in country Victoria) that the only reason the bats are that much more expensive than over here is because of the import costs that come with importing X amount of clefs from the UK - to back this up look at the cost of a GN XXX5 from Meulemans, or in fact any top of the line bat being sold in Aus. This means that he needs to charge 600$, which 3 years ago was £200-£240 = pretty reasonable. However because the Aussie dollar is relatively strong on the back of natural resources mainly, and the pound is quite weak that $600 is now many many more pounds.
My screaming cat has been easily the best bat I've ever used, it had one weekend where I hit 18 6's over two innings, pretty much all straight down the ground - and I'm pretty slight. But it has definitely died now after 1 and a bit seasons use, and it took a bit of time to become gun. I'd love another one, so I might try and visit Julian at Christmas when I'm back in Aus, but I personally could never pay £400 for just 1 bat...