Personally I gotta say if you think the LG Passive sets are good you probably need an eye test and are basing you opinions on poorly implemented shop demos. The ghosting i've noticed is terrible and being passive is only 720p, not 1080p
afaik.
The ative sets are a much clearer picture, but can often look dark at time, and if you think there are issues with light flicker, i've only ever seen that be an issue under shop / show lighting, not uder home lighting.
Either way I'd rather wait and see what the new OLED sets look like, or even wait it out for 4K sets...