i have never heard of DAME before, but looking at their site and samples, it's pretty fully featured!
Normally I'd say the editor depends on your use case - Ogmo seems to be the simplest (and easiest to use). It doesn't seem to have polygons as far as i can tell (i haven't used it much, just a cursory look). Tiled i have used, and if you're going to define arbitrary shapes for your physics lib, tiled supports that via polygon shapes in layers. So you can easily define your napeSprite using them.