Don't decide your race from what job you want to play :p. The difference isn't all that big. Besides, Elvaans are stronger than Galkas, and also have more MND for chi-blast :p.
Go with the race that you think is the most appealing. You'll need to level more than one joib anyway, and in the end, you might find that Monk wasn't what you wanted to become after all. You can change your job at any time without losing job levels, you know.