Russian Circles

From Discogs:

Russian Circles is a three piece instrumental band from Chicago. The musicians originated from the bands Dakota/Dakota and Riddle Of Steel. They selfreleased a 4 track CD-EP and signed with Flameshovel (US) and Black Records (UK) for their first full length on CD and to Hewhocorrupts (US) and Friction Records (GER) for the vinyl. Another limited 7" came out on Suicide Squeeze. In November 2007 they'll start recording their second album.Current line-upMike Sullivan -> GuitarBrian Cook -> BassDave Turncrantz -> Drums

From Lastfm:

Russian Circles is a three piece instrumental post-rock/post-metal band from Chicago. The band plays epic, sprawling music which runs the gamut of heavy discordant metal to soft delicate passages. They are also known for their energetic live shows, which include tours with Tool, Red Sparowes, Minus the Bear and Daughters, as well as appearances at the 2006, 2007 & 2008 SXSW festivals.

Formed in late 2004 by guitarist Mike Sullivan and bassist Colin DeKuiper (both formerly of another instrumental band Dakota/Dakota), they quickly recruited Dave Turncrantz, formerly of St. Louis band Riddle of Steel. In 2007 DeKuiper departed the band and Brian Cook (These Arms Are Snakes and Botch) took on the role of bass player for the writing and recording of their newest album, entitled 'Station,' recorded in Seattle with Producer Matt Bayles.

Station was released on May the 6th, 2008 on Suicide Squeeze Records.

On October 20th, 2009, the band released their latest album entitled 'Geneva' The album will featured same lineup as Station, with Brian Cook taking a much larger role in the writing and creation of the album. Brian Cook described the band's take on the new album being "less concerned with making sure we could replicate the material live as we were with making a compelling album."

From Wikipedia:

Russian Circles is a three piece instrumental rock/metal band from Chicago. Russian Circles play instrumental, sprawling music which runs the gamut of heavy discordant metal, to soft delicate passages. They are also known for their energetic live shows, which include tours with Minus the Bear, Chin Up Chin Up, Coheed & Cambria, Mono, and Pelican as well as an appearance at the 2006 SXSW. They were also the opening band for Tool while playing in the United Kingdom for their 2007 tour.