Soul Music - check out the output from
Soul Jazz Records. They have released a lot of nice things...
http://www.souljazzrecords.co.uk/dis...ction=2&Type=1
Blues - depends on what era. But
Fat Possum records have released some nice old style blues. Apart from that try your local library. Most have quite a decent blues section. Blues is a very broad church and starts with the folk blues / slave songs of the 1920s and 30s that Lomax recorded and continues through Muddy Waters, Beefheart, Doo Rag, The White Stripes et al.
Dave