Well, I have all three books and I do think Hunter's Planet is more interesting than War, however, as for the comic, I did enjoy reading/looking at the first half of "War". The second half of the War comic is pretty bad (especially, the artwork), but I enjoyed the first half.
Anyway, I have seen Prey at Barnes and Nobles, so I highly recommend looking for one close to your area. You can go to the Barnes and Noble website and check store availability of Prey.
I thought the idea of Machiko joining the Predators was a great idea, since I also like the idea of there being female Predators that also hunt, either along side the male Predators, or form their own female hunting clans.
Cenobite Queen, I bet there are some images of Machiko in the Predator armor on the Internet, somewhere.