For anything with a VGA output (like a 60in1), I always say, if you don't already have a monitor for it, pick up a computer CRT of the right size off craigslist and mount that in there. It'll look a bit sharper and be piss cheap.
CGA is 15kHz, 240 lines per frame progressive, 480 lines per frame interlaced. VGA is 31kHz, 480 lines per frame progressive, 960 lines per frame interlaced (though interlaced VGA is very very rare). VGA always looks better (even in the case of CGAi vs. VGAp the VGA has double the framerate and no interlace shimmer), but your source is the determinator, and I don't know what a 60in1 runs at internally. It can't hurt, in any case.