Try Bob Marley's, "Kaya" LP on the Simply Vinyl label. Great recording by a great artist.
Mapleshade Records has a good CD of reggae (on their Wildchild label) called "Ras Mek Peace". The recording, by a group called Midnite, is very punchy and well recorded. Check the following Mapleshade web site for more info (it indicates the CD is currently out of stock):
Just about anything on the Blood and Fire label is excellent. These are mostly re-issues of older material from the '70's to early '80's, but are beautifully remastered and carried into the modern digital world. The label is cleary a labor of love and run by people who really CARE about the music. In spite of it's decidedly non 'hi-fi' origins, most of these recordings that I have heard are amazingly punchy and full of earth & life. It's also a good way of digging past the exterior and the three or four reggae artists that most are familiar with. The Auralux label is a new label with an equal amount of obsession for unearthing the old sounds. They have been sourcing from master tapes and profess in the liner notes to using valve pre-amps and other gear in the mastering process.
Toots and the Maytals albums "From the Roots", "Funky Kingston" and "In The Dark" have been remastered well, and have many classics from which nearly every reggae artist (and many others) have been inspired.
I second the Black Uhuru vote as well, "Black Sounds of Freedom", "Positive", and "Guess Who's Coming to Dinner".
The digital remasters of all the studio Bob Marley and Peter Tosh albums sound great, and really clean. Rita Marley should get credit too, since she wrote many of Bob's songs, and has many great albums of her own.