I've taken screenshots of examples of Droid Serif, Fontin, and Georgia on my 350
(they also have adjusted line heights). Out of those, I've used Georgia for the longest time, and am currently using Fontin just because I get bored and switch a lot. Droid Serif I do like a lot, but a paragraph of it sometimes looks dense to me.
I didn't actually like the look of Caecilia when I tested it on the 350, but that's just personal preference.