Gaggia classics are single boiler. With the budget you are talking about, I would stick with a HX. There are a lot of internet espresso machine sellers out there. I would contact a few ask them questions about after sales service and see what they say. Sending a faulty machine back will be very expensive, and could cause further damage due to transportation. I would imagine that most places would deal with a local service agent for this very reason. Hopefully nothing goes wrong with it at all, but we don't live in a perfect world. There are only a few places near me that have machines on display. What I mean by that is they are sitting on a shelf for people to look at, not on a bench ready to try and these places aren't the places I would go to buy a machine. There are a few in Brisbane that do have machines on a bench that I know of, I think Di Bella did last time, and Bezzera have a small showroom. Maybe Adelaide has something but it's just not well advertised. Seems there is a drought (or a market opportunity) in Adelaide. 🙂 There's the usual suspects in Melbourne, and Sydney like Talk Coffee, Coffee works express, Jetblack Espresso, Di Bartoli, Coffee Parts that have websites for info. Never bought a machine off them, but maybe others will have some experience. Ask questions and don't be afraid to ask about after sale service and warranty.