The RS46 being potentially rated at 1,300 lumens is probably not going to be bright enough for 3D on screens over 100" unless you go with the High Power, in my opinion. While these projectors are rated at 1,300 lumens, they probably display half that or less when properly tweaked. I would go with the HP 2.4 at 133" especially if you can mount the projector behind you at head level or close to head level give or take a couple of feet. The downside of all this gain is for 2D. If you can't crank the brightness down enough for normal viewing, you will have to use a neutral density filter, but, using a 133" or bigger screen and low or eco mode, plus cinema mode, plus tweaking the contrast and brightness for 2D should not require a filter. For 3D, you'll want all the brightness (lumens) you can get. If you don't use the projector much for 3D, then there are other screen options besides the HP. Be careful not to be confused by all the talk about the JVCs and 2D images, vs. 3D. Normal 2D image lovers of the past dwelled on high contrast, black as black, and detail in the dark areas of the images, but with 3D it all changes. With shutterglasses, you need brightness (lumens) first and foremost, then all the contrast and black is secondary.