So, if we set aside the missing VW80 features for Motion Flow and Dark Frame Insertion, the VW70 may indeed be an excellent alternative to the RS20.
Based on feedback from RS20 owners so far, the current SXRD color decoding is much better right out of the box, such that any tweaks to peg the rec709 gamut can be done with less impact on overall color tracking. I think we all expected the RS20 to provide a 3D CMS solution and it apparently has not.
If you also consider the reports of RS20 convergence problems that go beyond the projectors ability to adjust for errors, the VW70 shift/zone panel alignment function is even more impressive.
I have not seen any RS20 owners post regarding uniformity issues, but again the VW70 has a service menu which can be used to correct any uniformity problems.
If you could hand pick a RS20 for perfect convergence, uniformity and best color decoding, the projector's native contrast advantage is most compelling. However, is the RS20's native contrast performance enough to offset compromises in those other critical image quality areas?
That is the $5.5-6K question.
I have seen the VW80 in action, which gives me a good idea of what a VW70 can do.
I still look forward to seeing a RS20 in action. I regret a local HT chain which carries the JVC line appears to have closed it's doors.
I was also hoping Neil would follow thru on his RS20 purchase, but I understand the restocking fee was quite high if he decided not to keep the projector.