Welcome Mick,
Given your location I'd recommend the Harrison then the DRB second.
I recommend the Harrison because of it's excellent shape and the fellow who runs the company. His name is Warwick and this is a link to his site.
http://www.cobrakits.com.au/index.html
He gives first class service which is the most important part of the investment.
I don't think any manufacturer has a good manual.
Cheers