Click to enlarge. SO close
I own the RS1. I've watched the two, consecutively. The Planar is sharper, has a touch better shadow detail, while the RS1x has the black level advantage. It's not huge, as the Planar is pretty good, in this regard, but the JVC is so good, that the difference is immediately noticeable. They are very similar in terms of brightness. The JVC also has a big advantage in terms of price, and even better placement flexibility, with its 2:1 zoom compared to the Planar's 1.3:1. Both are film-like, but I'll give the JVC the slight advantage, while, on the other hand, that difference in sharpness, adds more life to HDTV broadcasts of live events.
The RS2 has the best black levels around (so far), but it isn't as bright as the RS1 or the Planar. The RS2 should have more appeal, despite the same modest image softness, with the hard core enthusiast, but the Planar is just a great projector for those that want something that just looks great.