The issue that us Aussies face is you cannot import one-handed folding knives into the country anymore, so we are limited to what is already in-country.
The Manbug is very small!!
The Dragonfly 2 is bigger and a great little knife at a good price, even here. You should definitely check out the Spyderco Delica, which is bigger again, an excellent choice for everyday carry (which you will see referred to around here as 'edc'), and still readily available at several of the Aussie retailers. The reason you haven't heard of the Spyderco Ambitious/Tenacious/Persistence is because you can't get them in Australia any more. Stocks dried up ages ago and prices on the used market are insane.
If you are serious about building a collection of quality knives, then you need to focus on the folding ones first. Fixed blades like the Beckers can still be imported under the current legislation, but once the folders that are available are gone from the stores, that's it! Anything from Spyderco, Kershaw, Benchmade, or Buck will do you right. However, try to avoid buying from evil-bay as there are a lot of fakes floating around there.
Where in Oz are you located? And have you checked out
http://www.australianbladeforums.com yet?