Being something of a beginner in terms of modeling (still, anyway :\) I like the idea of a low-poly competition. I have no delusions I'll win anything but I like the challenge.
I would say for a subject, one could go with everyone's favorite Trek Spaceship out of them all: the 1701-A. It's well-recognized, popular, and subject to interpretation when realizing it. Sure it's a Fed and Feds (especially the connie) are overdone, but nothing says SFC like the Refit Enterprise. That's why we're all here, isn't it?
On the Topic... Not sure if I'm a fan of the things around the font ends of the nacelles or the color choices, but the general shape seems interesting. Like the Shuttlebay.