I personally would rather list HFS with full sized pics on html pages if they're from a trusted sponsor like yourself. The ads would be tasteful. One thing to keep in mind is that a pic on an html page won't automatically resize, which will force the surfer to scroll on "portrait" pics in order to see the full pic. Not necessarily a bad thing if they scroll down (especially if the ad is at the bottom of the page

), just something to keep in mind when considering it.
I allow pics on html pages on submissions, as long as they only have one ad and it's tasteful.