Here’s a pretty comprehensive password dictionary I recently came across that you may want to use in your security testing…there may be “friendlier” download link but I haven’t searched for it.
If time is a factor, this dictionary may be too big for its own good given the time it’d take to run through everything but at least you know you’re using a good dictionary. After all, your dictionary-based password cracking results are a direct reflection of the quality of your dictionary. Happy cracking!