I watched this on DVD first, loved the film, 4 out of 5. Great performances by Denzel and Russell. Bought it for £12.99 from play.com. Have to say I can't see much difference between DVD and Blu Ray. (Was a massive difference on The Departed, an older film). In hindsight I would have picked this up for £5 on DVD, although the 2 disc set with extras as on the Blu Ray, would be more expensive. As it is set in the 70's and with a very grey palette, the normal Blu Ray quality did not shine through. It does have a DTS HD soundtrack. Try before you buy.