My JVC HD-1 (RS-1 clone...) paired with a 110" Da-Lite Hi-Power screen is like a giant plasma.
Paired with a Toshiba HD-XA2 (HD-DVD) and a Pioneer Elite BDP-HD1 (Blu-ray) at 1080p24, the picture quality is unbelievable.
Colors are a little bit oversaturated on those new JVCs, but it's not worst/better then the Sony Pearl and Ruby I've seen and used. It's exactly the same CIE charts. You can't tweak the grayscale alot, but on the 2 HD-1 I've tried, the grayscale was nearly flat OOTB (dE less then 1 all across).
Great projector for the price. I've seen the Sharp 20K and a 3 chips 1080p DLPs (Vidikron) in the last 2 weeks, and the JVC HD-1 is easily on par with those, and in certain situations, it's better (for alot less $...).