What is rpx or rpx 3d?

R.P.X. = Regal Premium eXperience = Larger/better picture and sound quality. RPX 3D is the same, but in 3D format (special eyewear needed to view, that creates the illusion of the picture popping out at you, e.g. 3 Dimension)

Is rpx worth it? How much more is it ?

I agree, Todd is correct.

Todd knows his stuff and is good with info. His answer is correct.

Todd is correct. Happy New Year