What should I check out?

Morton Feldman "Coptic Light" (Michael Tilson Thomas cond.)
John Coltrane "Live at the Half Note" (Impulse)
Cecil Taylor "Unit Structures" (Blue Note)
Orlando Gibbons "Fantasias" (Jordi Savall-Astree)

Johnny Cash's series of American recordings

Wow, some great responses . . .

I'll second Tvad's Gateway recommendation, and add the eponymous first album, (from 1974-ish) to the mix.

Josquin des Pres - "missa L'homme arme sexti toni" - performed by the Tallis Scholars.

Bebo & Cigala (Bebo Valdez & Diego "El Cigala") - "Lagrimas Negras"

All of John Holloway's recent baroque-violin recordings on ECM, with works of Biber, Schmeltzer, Veracini, & Bach.

Eric Dolphy & Booker Little - "Far Cry"

Gidon Kremer & Kremeratica Baltica - "Silenco"

Charles Dodge, "Any resemblence is purely coincidental."

sweet; keep 'em coming...I will definitely check many of these babies out.

Warrenh,
"Directions In Music: Live at Massey Hall" (Celebrating Miles Davis & John Coltrane) featuring Herbie Hancock, Michael Brecker, and Roy Hargrove

On heavy rotation this year at the Bongofury house:

Burial Untrue
Calexico Carried to Dust
Cat Power Jukebox
Clutchy Hopkins Walking Backwards
Duffy Rockferry
Hot Chip Made in the Dark
Jack Johnson Sleep through the Static
Jenny Lewis Acid Tongue
Lemongrass Filmotheque
Lucinda Williams Little Honey
Mason Jennings In the Ever
Raveonettes Lust Lust Lust
Santogold Santogold
Shelby Lynne Just a Little Lovin'
Submarines Honeysuckle Weeks
TV On the Radio Dear Science
Vampire Weekend Vampire Weekend