That's kinda my thought to the progression, the 2k bamboo though is reserved for sharpening single bevels. I don't consider it a stone for sharpening double bevel knives, its abilities are kinda wasted when doing so.
I love my Aoto stones so between the bamboo 1200, Naniwa green brick, and my Monzen I have a few bases covered in respects to finishing. The 2k Ume is on my radar too
Me and Ken talk regularly about stones and sharp stuff.