OK I would make a Vewlix machine and instead of having the perspex Marquee holder put the 15" Monitor up there. Also as Mike A said, your trying to do too much, Simplify.
Recommend 27" monitor (Rotating CRT would be sweet, but you would have to build a massive cab) so 24" LCD Build much more logical idea. Rotating is possible but recommend putting that to the side for now.
Build a good 2 player 7 button machine with a Trackball in the center, you should be able to do it without too much problem. You will need to design the machine around the monitor you use. 27" will be around 2Ft wide so scale the build accordingly.