I don't believe there's a max level considering I've heard of level 500 Zenmasters (I haven't done it myself though).
And, IMO, the monk quest is the most annoying in the game, but I'm sure you already know that
-Jafin
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Proud Citizen of the United States of America
The Original Arch-Mage of the HADB
Destroyer of the evil Bunnies
Proprietor of the Boogre Bar
The not-so-secret admirer of Lioness
Mage of the Court of Lady Lioness