I'd say take AP Lit and AP Bio. AP Lit will kick your ass into shape if you've got weak writing skills, and it really went a long way towards helping me perfect my skills at writing BSsays, plus, the test really isn't that hard. Also, comparing Comp and Lit, in my experience, passing the AP Lit test with a 3/4 will do much more for you than getting a 3/4 in Comp - at a number of the schools I was looking at a 4 in Comp only counted for Freshman Comp, but a 4 in Lit counted for both Freshman Comp and Freshman Lit / Critical Thinking. Lit is also more interesting than comp, for obvious reasons, and they both have about the same work, at least at my school.
AP Bio is really dependent on the teacher, I had an amazing teacher who really inspired me with biology, and made the subject matter very interesting. It is a VERY good prep for lower division bio major classes, at my school we even used the same book that my into bio majors classes did (Campbell - which is the Bio Bible!). If you do well in AP Bio, you'll find that you really already know most of the material from your freshman (and likely sophmore) bio classes, but they add a small amount of detail that AP bio didn't have time to cover. And also, the test isn't particularly hard either.
AP Stats on the other hand, I dropped out of it after the first week and opted to take Anatomy (offered at my High School), and from the experience of my all of my friends who took it, they said it was a total pain in the ass, and tons and tons of busy work. I simply took actual college stats the summer I graduated high school, knocked it out in a month - college stats really isn't that hard, it's more or less the same material, but hardly any of the busy work.
Oh, and AP Gov is a total joke, I finished the test an hour and a half early, and managed to get a good nap in.
Good luck!