Voivod, Sacred Reich, and Vio-Lence are not obscure, but are all excellent. I've heard Mekong Delta, Into Eternity, and Deliverance as well, but they are somewhat obscure. Brocas Helm is very obscure; I've only heard of them, I've never listened to them. They're supposedly similar to The Lord Weird Slough Feg, another obscure band I own the CDs of. Some of the others I've never even heard of, so I'd say they must be very obscure.