You may just want to copy my build...

I'll see if I can dig up all of the specifications, you should be able to search the forum for posts by me and find the info somewhere.

You won't be disappointed with the CHI heads.

 

Seems like poeple are favoring the CHIs, so thats probably what I would do if I had the money. Aussie heads are good if you are on a tight budget, and lots of people run them, but like everybody is saying, there is always room for improvement over stock castings.