Use Tru Vue AR glass or Museum Glass, each of which has a high-tech coating to minimize reflections. These make all photographs look better than using either regular picture-framing glass or traditional etched non-glare glass. Museum Glass provides better UV protection than AR glass, with an anti-UV coating on the side of the glass that faces the art.
Yes, I thoroughly checked out the UV situation dealing directly with the Swiss manufacturers of a leading brand some time back, and teh UV cut stuff is a little bit of an upsell if you ask me.
IIRC, Regular framing glass cuts 15% of UV, the high quality AR framing glass cuts about 70% of UV due to its coating. The UV cut or 'Museum' glass gets that up to about 97%, but this is often accomplished with a laminate layer inserted between 2 sheets of glass. So you get a heavier and thicker glass, which gives a stronger color shift to the image, and most importantly, nobody knows what will happen to that laminate itself over the years - will it yellow, or go brittle, or suffer from crazing?
When you you remember that the average gallery and home is light by Tungsten or Halogen lighting, with dramatically less UV, it all seems a no brainer. I went for the straight AR stuff - seems like the best compromise.