How do you judge the quality of a journal?
The way I usually choose journals is by looking at where people I trust/follow publish, and where previous work was published. It is usually not too hard to compare the quality your work to the quality of the work you are citing, and chose a target based on that. Unless your field is highly mutli-disciplinary, you will see the same journals/conferences popping up again and again in your references; submit to one of those.

Before submitting, however, it is always important to look at a few articles from previous issues. This will give you a second gauge of quality for the journal and also let you pick up on any formatting and presentations quirks that might be present in the publication.