I would like to draw your attention to this free Wall Street Journal article on Dan Fuss of Loomis Sayles. Dan Fuss is a fundamental genius in bond investing, and anything you hear about him is worth reading. Largely because of his reasoning, I own a decent slug of Canadian bonds for my balanced mandates.
I will contrast him with the better known Bill Gross of PIMCO. PIMCO is largely a quantitative shop, implicitly writing out-of-the-money calls against their fixed income positions to generate incremental income. Dan Fuss makes big investments on what he believes the world will be like 3-5 years out. His view of the world has been uncanny for several decades. No surprise that he has been the best in bond management over the long haul.