bianca is warm in 15mins
other e61 20-25 mins unless they now have heating tech in them
crazily £1500 isnt an easy budget, you are just off the top end dual boilers and just over the single boiler stuff
id always recomend a dual boiler as you have more temp stability, esp if you are a milk steamer
the liz is a vibe pump - one reason i never bought a liz, the noise