If you don't want to spend an arm and a leg I can vouch for Atlas Cables AES/EBU from the UK. There are definitely better and more expensive cables out there but unless you can get trials by mail it's very difficult to compare a bunch of digital AES/EBU cables because most dealers are only going to stock a couple of brands. In my experience there isn't one cable manufacturer that does it all right. Some are good at power others good at interconnects etc. YMMV.