May pull the trigger next time the dual boiler goes on sale, but there's one thing not clear…
Does it heat up instantly or need time to boil? If not instant, how long does it take from powering on to ready for the first shot?
Currently we have the Barista Touch, it's a thermoblock machine, so pretty much instant. We have a separate grinder, also we don't use the programmed drinks function, and I froth milk manually. It's a great machine, but we don't use many of its features, that's why thinking about the dual boiler.
My experience is that it takes anywhere from 6-10 mins (depending on model!) to get a nice stable steam level out of the breville boiler based machines. Much slower that the thermoblock systems but the boiler systems are better if you do lots of steaming or lots of coffee's.