Here's an example of the kind of professional, CSS-based layout you can achieve with XMod and the new Repeater Template in XMod 5.0. We can't take credit for the design. That goes to Andy Clarke and his excellent book: Transcending CSS. We've modified it somewhat for use in DNN and in XMod, but the essential components are unchanged.
This should look good in IE and FireFox but you'll notice a few additional enhancements in FireFox. For instance, when you hover over an image, a thin border will appear. Also, when you click the image, not only will you be taken to the image's related description (which also happens in IE), but the description will be outlined in a border as well, so you can easily pick it out in the list.