I've just been at LAX on an almost daily basis for the last couple of weeks.

They don't have huge numbers of either of this class of car, compared to some other categories. Everything that I saw is listed in the Wiki. So review that, and decide based on that what you fancy. I can tell you what I would pick assuming every car listed was available (which it probably won't be on the day), by my critieria are very likely different from yours, so you would not necessarily agree with my recommendation.

(FWIW, I would pick a Chrysler 300).