I use Poser 4 and am quite pleased with it. I also have Poser 5, but have never installed it because some people have problems with it and some don't. Poser 4 works properly for everyone. Poser 4 comes complete with a collection of characters and animals, and here (both free and in the marketplace) you can find all the extras you could possibly need or want. Plus, many people here know of additional websites for even more offerings.