I think cage could be good, but call it 'The CAGE',
I can see the marquee being done with a small 'The' in the top left corner and big blocky CAGE lettering taking up the rest of the marquee, I also think is quite good in that the machine will trap you into playing it for hours and hours on end so its kind of a play on words in that way as well.
I guess another big factor is how your going to theme the cab, is it going to be you own design or a restore of an original cab?
Good luck
Cheers