2" Diagonal- Dielectric? Yes or No?

I have an Orion by Vixen 102 f/10 refractor. I'm awaiting a 2" focuser. When I get the new 2" focuser installed, I will need a new 2" diagonal. I've been looking at William Optics Diagonals. I have a choice between the dielectric 99% reflectivity for $168.00 on sale, at ATWB, or the mirror diagonal for $130.00, also at ATWB.

Is the dielectric worth the extra $$$$?

Thanks for the advice. Mike

Sure is! I've got two of 'em, one for my SCT and one for my refractor.