I've heard excellent bassists from both camps. I myself got my original
foundation from Franz Simandl's method books and etudes, and later
studied from books by Ludwig Streicher and Franco Petracchi. And for
bowing technique alone, there's "A Contemporary Concept of Bowing
Technique" by Oscar Zimmerman. I'm not too familiar with Rabbath's
technique but I'm looking forward to checking out those links from
Markus.