it will probably be quite good, pioneers anti-grare coating is not to bad, huge improvment over lilliputs etc.
AFIK an rgb input is the same as a VGA input, you'd just have to make a custom connector.
also the touch screen would probably send signals over a pioneer bus of some kind, so it wouldnt work with a pc..
thats just my guess....
EDIT: i just found some info on rgb signals, they are similar to vga but use different syncing methods, you'd have to build one of these probably
http://www.hut.fi/Misc/Electronics/c.../vga2rgbs.html