JeffPersson wrote:...I'm wondering how much I might benefit from the reproducibility of different grind settings on the Vario and the absence of a doser.
You already own a 64mm burr grinder, so there's little motivation to switch performance-wise. I prefer a dedicated espresso grinder instead of switching back and forth between drip/espresso grind settings, even if it's one with little ground retention like the Vario.
JeffPersson wrote:I'm trying to decide if I would be better off getting a refurb Vario or sticking with the SM-90 and putting the $400 into the espresso machine fund?
I would save the cash for later.