Boris is a great band because they have lots of variety in their music. They can make the softest 20 min epics and on the other hand they can make something with over the top feedbacked guitars. Plus they have a chick guitarist, which is always cool.
If you got intrested, I suggest their Pink and Heavy Rocks albums, cause both of them are mostly filled with that "Stoner Rock" material. Other great albums from them are:
Boris & Michio Kurihara - Rainbow (Features slower and softer songs) Boris - Feedbacker (Only one song. Over 40 min...) Boris - Akuma No Uta (Also mainly a "Stoner Rock" album)