Ivan and jdcarpe already highlighted all of the important figures.
It is not possible to replace all of the keycaps and the keycap layout is not ergonomic. They are all flat
so we will get tired quicker if we type a lot on it.
In term of keycap layout, it seems Noppo Choc Mini (the old version) is a better choice because Noppo has Cherry keycap layout.
Other than that, Deck 82 is a great choice, it's rock and solid like a tank. It has the highest quality of led, dual layer PCB, thick and heavy steel plate.
Although the keycap has unpleasant typeface, they are thick double shot PBT, so it will survive at least for many decades.
It can explain why its father, the TG3 BL82 or TG3 Data911 are the choice of some US police department (as long as I remember correctly)
And yes, you should try the cheaper version TG3 BL82 or TG3 Data911 as Ivan suggested. The only different between Deck 82 and TG3 BL82 is 2KRO vs NKRO which is important for only some games.