I'm really into slush type drinks like frappuccinos, tango ice blasts or just regular slushies. Sometimes they are too sweet, especially the coffee shop ones. I'd like to buy a blender that can crush ice to make my own at home. I know this is pretty hardcore for a blender but they seem to manage on Starbucks. Could anyone recommend one please or give some info on what I need to look for in a blender which can crush ice. Thanks