I'm from Melbourne and simply made a consult booking with Jim Roseberry, gave him a link to the stores that are close to me, gave him a budget and he told me what to buy. I then built it myself. It's easy as heck to build your own pc.
Unless you're completely clueless about computers, it's a pretty simple task. Plenty of YouTube vids out there and getting a quick consult from Jim makes life super easy. My computer is DEAD SILENT. Not a sound. It runs pretty solid. I think my Edirol is maybe on the way out or playing up a little, but that's nothing to do with the computer. If it suits, I'd certainly suggest giving this a shot.