Maybe Harman has made some changes, but in my tests of matte papers, the Harman FB Mp (white matte) was good but unexceptional. Black ink alone reaches a dMax of 1.59 on my Epson 3800, and then reverses to 1.57 at the end of the curve. Their Glossy FB Al fares much better.
If you plan to print that image on a matte paper, I'd suggest that you try Epson Velvet Fine Art, which has the best dMax of any matte paper that I've tested so far(black ink dMax of 1.77 with no reversal), a very smooth tonal response, and the slight warmth of tone to the paper white that should work very well with that very excellent image.
I'd also suggest that standard glass is not as transparent as clear Plexiglas. Glass adds a tiny bit of green cast that may have a slightly negative effect on the warm colors of your photograph. It's flatter, and won't scratch as easily as Plexiglas, but glass also has the potential to break in a manner that is unkind to the print.
Aloha,
Aaron