I'm attempting to make it so that the first teaser in this list has a larger image than the rest of the teasers that follow down the page. Consider it a main story type approach.

I essentially want it to use a different imagecache preset for my first teaser and then a different preset for every one that follows. My teaser is templated by contemplate and I'm using quicktabs + views to display the node. I know how to pull these presets dynamically in content template, just now how to detect if it's the first row.

Is there a way to do this in my content template? Or any help in the logic of what I'm doing in general?