Exhibition Fiber is REALLY bright - I haven't used any other fiber-based glossy paper that's that bright. My go-to fiber-base luster paper is Canson Platine, which I love - but it doesn't come in 5x7".
Almost all 5x7" gloss/luster papers are going to be resin-coated (which Galerie Smooth Pearl is), not a fiber-base paper like Exhibition Fiber or Platine. Think of a silver gelatin print on Oriental Seagull or Kodak Polyfiber (fiber-base), rather than the same print on cheap Polycontrast Rapid (resin-coated (RC)). I could find two exceptions (one of which comes in two versions) at B&H - there are a couple of Red River papers you can order directly from Red River. Ilford makes Gold Fiber Silk, which I've never used but many photographers swear by, in 5x7". B&H carries it, but as a special order item. Ilford also makes something called Gold Fiber Gloss - probably a glossier version of the same idea, in 5x7" - B&H has that in stock... Moab makes Juniper Baryta in 5x7" (back-ordered right now). Unless a paper says something like Fiber, Rag or Baryta in the description, it's an RC paper.
The aforementioned Red River Palo Duro Soft Gloss is a fiber-base paper, and Red River also makes something they call Baryta Fiber Gloss (I may have the name slightly wrong, but it's close). That's about it - Canson doesn't do 5x7", Hahnemuhle doesn't, Innova doesn't.
Another thing to check is whether your photo printer will feed 5x7" - many of them, especially the bigger models, won't.
