To me it depends on the situtaion, the Horizon wins for overal versitility however in my opinion.
best balance standing with a strap - eclipse
best balance sitting playing in classical position - eclipse
best balance sitting with no strap guitar in horizontal position - viper
most comfortable body shape - horizon
best for speed and playability overall - m II shape
also for some reason I feel cooler than I actually am if I am playing an ex with the vintage banana headstock and they balance well if you are standing
I also own an m-ii NTB! That thing is amazing. The neck is amazing! Smooth as butter and the body fits perfect.
I feel the same way. I feel the M shape feels most right. I like the feel of my EX. But it doesn't feel as smooth as the M shape and I rock my ESP kh-603 eclipse spider and it feels best when playing standing up. So in a way they all have their pluses :)
But mine goes to the M shape most comfortable guitar ive played :)