Thanks for all the input, everyone.
Decision made: Lido 3, which seems ideal for what I'm looking for.
The Hausgrind/Feldgrind and Commandante options look great too, but availablity is pretty much nil. The L3 seems very solid and well-thought-out, I don't think anything handheld is going to beat its burly 48 mm burrs for grind quality, plus it just seems like the most fun toy to have. If it's as good as I'm expecting, it could end up being my main non-espresso grinder, and the Mazzer can stay dialed in for espresso full-time.
While I was at it, I ordered Rhinowares' mini mill that grinds directly into an Aeropress:image credit: coffeehit
I checked out the standard version last month in London and it seemed decent, so I figured this version would make a nice little present for a brother of mine who does tons of travelling and also likes his coffee. It should get a good workout during our next backpacking weekend. The Zass one seemed very good too, but the company I bought the rest of the stuff from didn't carry it, and it would have been difficult to justify placing a separate international order for one.
To complete the grinder spree, I grabbed a 33M burr set for the Mini-E.image credit: mazzer
The current ones are about due for replacement, so I thought I'd try out this common swap from the next-largest model that uses the same 64 mm carrier with a more powerful motor. There are a few reports of the more aggressive cut causing the Mini-E's 250 W motor to stall out ocassionally, but most people seem very happy with it and report no problems. I'll let you know how it goes.
Definitely looking forward to giving this stuff a spin.