Which theme for this site idea/design?

I'm building a site that will feature classified-ads (intend to use the 'classifieds' plugin), but don't know which theme is best for this. Reason for the two designs is that I'm not sure whether to have the classifieds categories showing on the home page or if I should have a separate page/section for the classifieds...

The two designs are in the following post...

Thanks if anyone can advise