i didnt realize much distortion, besides the signal strengths between the consoles and their modifications.. the screen is alway perfect, and i have yet to see it fail in any system i throw at it..
I broke out the stereo ofcourse from my ghetto housing that ive made for the pvm as you can see here:

the housing


and the break out of the stereo cable. I have it looped from standard rca, and headphone just incase.. make sure the conections are solid (this helped fix the feedback noise)

so far ive tested with all j21 rgb cables:
superfamicom (sound doesnt knock as good as the megadrive for some reason)
famicom (unbelievable, requires a lot of brightness/picture adjustments from the norm. Maybe due to the internal rgb chip?)
pcengine (duo.. words cant describe it)
neogeo (under 10000 model, perfect)
megadrive 1 (depending on the cable, i have both a stereo modded rgb cable, and standard.. the standard mono delivers an insanely strong signal, while the stereo modded cable works standard even with the neogeo)
megadrive 2 (the rgb signal and colors seem washed out, not a good choice)
cdx (colors again are insanely washed out. almost like a different console)
nomad (see cdx.)
jvc x'eye (second favorite rgb output next to the original megadrive/genesis 1)
master system (use the megadrives amazing rgb output... converter for both mark, and sms, or use a power base converter which works well)
saturn (perfect)
n64 (thanks to the japanese version for the brighter clearer picture, however still needs adjustments)
psx (perfect on both old dualshock model, and PSOne)
ps2 (runs amazing, even with the godofwar2 high res code)
xbox (eh.. stick to the component hd at this point)
dreamcast (does a great job, but...id rather be using the vga connector)
one thing i learned is that you should never base a quality of the image on its raw feed,. almost always ive noticed its usually the cables fault. make sure you check with 2 different types of rgb cables before making any unnecessary adjustments to tv settings and consoles. I have 2-3 different types of rgb cables for multiple systems, and noticed a quality change, even an rgb pattern change based on certain cables..
as for pc's all you need is a fixed frequency supported vid card, you can buy a few different types at this website:
http://www.si87.com/Products/Videocards/hopefully this helps i'd like to see pictures of how you guys connected the cables? or made any other special cables for this tv.. the pvm is by far my favorite rgb monitor because of its strong signal.. im working on another project which will be on a 29" NetTV which has db15 connectors and is capable of running 15khz rgb.. wish me luck.
tsenzen