Miscellaneous thoughts in no particular order...
#1 rule.... Beware of water damage.
Take the following items:
- A long heavy duty extension cord
- Tape measure
- paper
- pencil
- a vehicle to get your purchases home
- money

If you buy a cabinet with intentions of puting in a larger arcade monitor, you should pay attention to the inside width of the cabinet.
A 25 inch arcade monitor with frame is about 23.0 inches wide.
A 27 inch arcade monitor with frame is about 24.5 inches wide.
A 33 inch arcade monitor with frame is about 28.5 inches wide.
Whatever size you plan to use, make sure that the cabinet is about an inch or so (at least) bigger on each side.
Make sure that whatever you buy, you can get through the doors in your house.