Nice work! Stitching looks great. Interior looks really nice, complex but not overly busy. Creases look good. How many coats did you use for your edges? Looks like they just need more sanding and a few more coats... But it gets old I know.
Horween Essex exterior, goat interior, painted and waxed edges, saddle stitched with Lin Cable. My edges turned out a little thick but I'm pretty happy with it. Need to work on my skiving.
If you're looking for luxury type leathers you'll need to look for leathers from France, Italy and Germany, mostly calf skins.
Check http://www.fineleatherworking.com
Regular PVA white glue for leather will work fine. Try Fiebing's. You might need to rough up any finished surface first.
If you're using a stitching chisel you can punch all the way through but a stitching groove might help too.
If you don't want your work to look like crap don't use a dremel tool to drill holes for stitching. The holes are too big and are neither angled nor diamond shaped. Most pros who do great work use two needles and an awl.