My apologies - late night problem reporting always looks weak the next morning!
Site url updated in the first post.
Just found the answer while working on this reply. I've been trying to adjust the brightness of the images on the S5 Image and Content Slider v4 on the main page slideshow, with no success, until I realized that the other part to opacity was the color of the background. I found what I was looking for in the CSS class 'withArrows a.open'. By lightening up the background from #000 to #333, I gained the brighter look I was seeking.
Hope this helps someone else as well.
Thanks!
Brad