That looks great, Marcio!
If the glass offers UV protection and is optically clear, I'd say it's worth it. When offering these for sale, I'd make note of the fact that the glass is 'museum grade' and offers UV protection. (You can include that on labels, descriptions, etc.) Mentioning that will increase buyers' perception of the value of the item.
I've purchased anti-reflection museum grade glass and museum grade acrylics for a few special projects. It's expensive, but my buyers love it and understand that it adds value by greatly increasing the level of protection for their new artwork.
EDIT TO ADD: Here's a link, for readers wanting more info about museum glass and acrylic -
http://www.tru-vue.com/Tru-Vue/Products/museum-glass-anti-reflective/
Tip: Be certain to let buyers know if your museum glass has special requirements for cleaning. Some of these glasses can't tolerate regular, amonia-based, household-type glass cleaner.