You should be able to find good Bard stuff in the Mabinogion, the Tain bo Cuailgne (only a tiny bit, but still), and the tales of Finn mac Cumaill (Finn McCool). Especially the salmon of wisdom story.
Bards were performers, but their main role was as lorekeepers and teachers -- it's easier in a non-literate society to do that via stories, songs, and performances in general. Bards also performed legal functions as well, as they would be expected to be familiar with the legal code (Brehon law in Ireland). This has similarities in medieval Iceland, where the Lawspeaker was expected to memorize the legal code (gragas) and then recite it publically at the Althing in three parts, one part per year (hence the Lawspeaker's three-year term of office -- when he was done speaking the law, time for a new election). The main similarity here is the theme of law-as-performance.
Now, bards like -that-, which is more in line with the first edition bard (often ascribed magical powers in stories, esp. the salmon of wisdom), as well as their connection with religion (being interconnected with the legal and societal codes of the time), and knowledge.. that's okay. Bards as Brave-Sir-Robin types make me want to bludgeon them to death with a lute, and the roguish aspects also I don't like.
As for sorcerers/wizards: I don't like spontaneous casting. In fact, the entire entry for the sorcerer class in the Player's Handbook annoyed me, with the dragon blood allusions, etc. I think using Charisma is excellent for the class, but I still don't like spontaneous casting. Note that bards also cast spontaneously.
Oh yeah, and Hennet's a total goober. I don't care for the iconic characters at all in general (no offense to those who like them, of course, de gustibus non disputandum est) but Hennet made my teeth hurt. Devis too, come to think.