Hi,
To my knowledge, I believe JVC 50U doesn't require any video scaler since it would be able to support the most common ARs. JVC DLA-HD250 has a vertical fit for the purpose of 2.35:1 AR using the anamorphic lens option, so its obivious why that RS-50U shouldn't have in its feature list. Unless, you still want the video scaler for any A to B AR change etc.
Coming to 3D projectors, its too early to comment and is slowly catching up until the technology matures and there is going to be a standard 3D technology which will followed by all the brands. Moreover, the other side is we getting bankrupt buying expensive 3D glasses, 3D bluray media, 3D bluray player for watching the third dimension of the movie. If you have this kind budget - man Iam really jealous of you; anyways If Iam in your place I would consider buying the RS25U or if you extend a bit going for the RS35U which speaks for itself.
As for SIM2, seeing technical specs I can only say - WOW, but if you are prepared to spend a fortune please go ahead which should serve you for the money spent.
