I'll go with the Steely Dan suggestions, two against nature is a great disc, but to answer the original question, I seem to like the Dolby D on the Santana disc. The DTS is just too bright on my system (horn tweeters perhaps) although I agree that the frequency range is much better with DTS. Either way you go, the Supernatural disc is a must have.
As far as a recommendation, I like Stevie Ray Vaughn - Live at Montreux. The first disc is good, but the second disc of the set kicks major hiney.