I have always wondered why in the heck you guys make two piece cabinets? It makes the cabinet heavier, structurally weaker, and it is not authentic. Of course, all of that can be said for MDF too (real cabinets are plywood, or laminated particle board)..
I have games that I have moved countless times, it isn't THAT big of a deal. My Kangaroo came out from a basement, into a shed, into someone elses basement, up from there down to a different basement (90 degree turn in the steps on this one), out from there up to a second floor apartment (180 degree turn in the steps), down from there to another 2nd floor apartment (with another 180 degree stairwell).
If you are really concerned about moving ease and weight, then make the monitor easily removable. That is the heaviest thing, better to pull the monitor and move it separately than the lop off a 20 lbs section at the bottom to move separate and then be stuck with an unwieldy top sectiom.
After one auction in particular, Dave and I were SO tired from moving games we ended up pulling the monitors on like 8 games before we moved them up to the second floor. Normally we can get almost anything up the stairs without a problem, BUT the first two things we moved were an EM Bingo pin (in ONE PIECE, almost 400 lbs), and a STUN Runner. After moving those two we were having trouble lifting EVERYTHING, so out the monitors came!!
Of course, adding insult to injury, later when someone came to buy the EM pin, he showed me that it actually DID come apart into a pair of nearly 200 lb units that were MUCH more manageable.