I spent two years looking for the right cabinets, as I wanted them large enough to take 1/32nd scale 'fighter size' models, as well as 1/48th scale models, hopefully up to four-engine bomber size (and/or twin engine 1/32nd, such as Mosquito and Beuafighter).
I finally got three, single door, all glass cabinets and a double door, wider version, for the smaller stuff, at a third of the retail price,and two large, deep, double door bookcase-type cabinets for the larger stuff, both of these for half the price of one!
The latter have four, fixed, wooden shelves, but there's space to add glass shelves in between, which I'm preparing to do, and also ad some extra lighting.
They took some finding at the right price, but the wait has been worth it - and what a difference they make, not just for display, but also keeping the dust out.