Alternative to Go? As a "lifetime" gift

Hope its not heresy to post here, but I suspect the folks here will be well informed and helpful - My daughter is 21 soon and we wanted to get her a gift, something to last many years. She admires our Go, loves coffee, especially milk drinks etc and has worked as a barista - so we are looking getting her a Heat Exchanger or Dual Boiler machine. The Rancilio Pro X is a bit industrial and Mara X also not exactly pretty - thoughts?