GewoW wrote:what's your input?
Listing features and benefits when you don't know what is important to you is no way to buy anything; on top of that, your list has some howlers:
The service costs of an espresso machine rise with its initial cost, pretty much regardless of reliability (non-annoyance is proportional to reliability) -- certain parts need to be changed regularly, and they just cost more on big machines. Descaling is trivial, changing pressure stats is trivial, changing heaters is trivial. Doing it for larger machines is more expensive than smaller machines. But well laid out large machines are much more pleasurable to work on, if you do you own repairs
However, if you don't want to buy parts on-line and get inside the machine to do your own service and repairs, you should go with whatever can be expeditiously serviced locally. In that case, you don't care how reliable the machine is, only how reliable the service organization.
As to the difference between the Aurelia and the Appia: I can walk up to an Aurelia and pull good shots from the get go. The Appia has the usual HX machine learning curve, and it would take me about six weeks to learn how to use correctly. Since you are inexperienced, potentially, it will not make all that much difference, since learning how to make shots and how to use the machine will be conflated, and learning to make shots takes longer.
However, since nobody on the board has an Appia, you'll need to learn for yourself how to set it up for temperature control, i.e. how to flush it, etc. Given the thermosyphon and heavyish group, but lack of the Aurelia's ultra-heavy group, hi-tech HX, and jetting, the machine will have a long thermal memory rather than absolute stability -- that means a complicated flushing routine. Chances are any of the rotary HX/E61 machines will be easier to learn, since you can get Eric's group thermometer and ask on the boards about the correct flushing routines.
If you go the Appia route, you should get a Scace, so you can figure out the temperature management of the machine quickly.