a good 'raise or fold' scenario?

I like the concept you're using: trying to get other hands that may be better or become better to fold. But, I don't think the check-raise is warranted either by the size of the pot (6 BB after you accomplished your purpose of folding the other two players) or by the strength of your draw (I count 4 outs, which is liberal). So, while your % chance of winning the hand may have improved by your c/r, I don't think it improved enough to make it worthwhile.