I had my RS-20 calibrated yesterday by Jeff Meier (umr). The JVC in THX mode (tweak) can look very good but post calibration takes it to another level entirely.
This projector is capable of truly magnificent images. D6500K grayscale accurately adjusted looks incredible. Gradational variations in primary colors regardless of how bright the scene is are so much more enriching. Skintones, skintones, skintones....wow. Custom gamma, subtle delineation in blacks, eye popping contrast. Total package.
Jeff's methodology, knowledge of this product, knowledge of his instruments, and practical approach all made for a superb experience that yielded stunning results.
Hands down this is the best projector I have ever owned. Those who own one or are considering it there is no doubt that it is a killer bargain in the cost/performance category. Figure the cost of a professional calibration into the price. The unit can really shine in the hands of a capable calibrator (Thanks Jeff ).
As an aside Jeff also performs full audio calibrations. He is every bit as capable and equipped in that regard and tweaked my audio setup quite nicely.