For traveling, I've got an old leather money belt from Patagonia that is perfect. It will hold a ton of cash, passport copies, etc. without ever getting bulky or uncomfortable or ever looking like a money belt. It's a shame that they don't make it any more, though mine is over 20 years old and has at least that many more years left in it. If you can find an old one on eBay or someplace, then grab it.
For every day, Narragansett in Maine. Custom length, width, color, buckle, hole spacing, etc., in multiple styles with great quality. They're a steal at around fifty bucks.
http://www.narragansettleathers.com/gallery.html
If you want the best, then Equus in England. Beautiful leathers and you can customize every detail, right down to the color of the stitching. And their damascus steel buckles are amazing. Priced accordingly.
http://www.equusleather.co.uk/belts/all-our-belts.html