UI was always close to my heart as they often used two bassists to create their sample laden post rock compositions. The sound was thick and groove heavy, with lots of tasteful guitar wanderings. They didn’t record many albums (3 i think), their last entitled Answers was released in 2003 and is solid all the way through. Here is a great live studio clip of the song Sleep Hold.
UI Sleep Hold
Link via the excellent Zombi Baba Blog (you can download Answers there…but you should buy it from Southern Records if you can afford it…). you can also check out some clips from a documentary about UI here.