Hmm, if you're not going to use unarmed strikes, Monk might not be the best choice. I can still work, since it grants you an AC boost and access to a speed bonus above something like Fighter. Something else to consider: you can't use Flurry with just any weapon. But your idea is basically to disarm someone, take their weapon, and beat them to death with it? Flurry might not help you out too much here. So now you've got AC, -1 BAB, +2 ref/will, unarmed strike, flurry, and the speed bonus above a Fighter. The speed bonus doesn't really apply unless you can stack things to get it (feats, items, etc.) and flurry doesn't help you unless they're using a special monk weapon, which I can almost guarantee they won't be. If you end up using your own unarmed strike about 50/50 I'd recommend sticking with Monk and making your US viable for combat. For the second level, you just have to do the math yourself. Is the second level going to get you enough stuff to justify the loss of casterlevel/spells? The level gets you saves, BAB, Evasion, and +1 monk level for all monk level dependent things. If you're coming up 1 level short for an unarmed strike level or something, that makes the level a bit more desireable, for instance.
Now, you're going to want to try and get either int to attack, or change your priorities so that str is top (or dex, but with str you won't need to jump through hoops to get a decent trip modifier if you end up taking the feat).