So after a lot of contemplation, I'm definitely leaning toward a new grinder to replace the DF83V.
The DF83V has been a solid grinder, working well while I was using it. My main complaint is that the flat burrs are just too finicky for the type of espresso I enjoy. Moreover, I never really found consistency going from shot to shot. Something always changed and I might get three completely different shots with only one making my somewhat happy. I even went to the extent of getting a leveling tamper to take tamp variation out of the conversation. Now the few times I opened it up to run filter coffee, the results were quite excellent.
Right now I am leaning heavily toward a Niche Zero.
On the table were the Niche, Lagom Casa 65 and the Varia VS6.
I do like the overall vibe of the Option O Lagom Casa 65, however I get hung up on the almost routine comment that it tends toward a "cleaner" shot and is designed more to focus on lighter roasts.
On the flip side, I know the Niche uses the Mazzer Kony Burrs which are a little more familiar to me and I trust to deliver the type of espresso I really want to be drinking.
But then I keep coming up on the Varia VS6 machine. While it comes with a stock flat burr, the burrs are interchangeable and I can actually install one of their conical burr sets. Of these the standard Stainless Burr seemingly matches what I would expect from the Mazzer burrs used in the Niche (lower acidity, higher body and medium cleanliness).
Of course, there is one other option which is to change my DF83V Burrs from their stock burrs and try again with Mazzer 83mm flat burrs.
Anybody out there have any thoughts you would care to share?