In either case skip the BCG450 - its not fine enough for anything but perhaps plungers, especially if youre going to go the path of unpressurised baskets, fresh beans, etc. The smart grinder is excellent - see if they can do a deal on that, it will handle many machines above the 800ES.
Presso or Espresso? Theyre different, sure. I would find somewhere you can taste them both, as they are different. How many do you want to make at a time, what about milk, etc. Presso is surely simpler than a Breville, which may help with breakages if youre out of "range". Ive never tasted a presso so I dont know for sure.