replacing a broken arcademonitor with a sony pvm or pgm usually is a very bad idea. this type of video monitors are large , heavy , filled 2 the roof with tech and not easy 2 dismantle. use em like they are meant 2 be or leave it in the casing and build a cabinet around it .
the easiest way of arcade monitor substitution is ripping a tv. i replaced several burned tubes and broken arcade chassis in japanese , chinese and eurocabs with philips , toshiba or samsung tubes and tv chassis taken from common brand tvs. if ur naomi tube sucks , use a 29 inch toshiba tv one . it fits 100 % with the mounting holes of ur cabinet . ll u have 2 check is the type of tube , if its curved , semi or pure flat so the bezel will match .
there is no difference in picture quality between arcade and tv using rgb 15 khz or rgb 31 khz via vga input , except ur tv doesnt directly support the jamma stuff and has a computerlike osd where everthing can be set via remote control.