Michael and Victoria are both retail models from Zygote/Daz 3D (www.daz3d.com). Theyre much more versatile and expressive than the default poser models, and require much less postwork -- meaning when you pose them they have less joint anomalies and sharp edges. They do cost quite a bit if you take into consideration that you need their clothing packs (standard poser clothing wont fit them). Your best bet is to pick up their CD compilations, which include their clothing pack, texture map and hair at a discounted price. Id go for Michael first, since the P4 nude male isnt very versatile. However, if you dont want to spend the money right away then there are plenty of free items here on Renderosity that can get you started. Grab Dr. Morpheen by Syyd, the best texture out there for the P4 male. It also comes with quite a few morphs built in. Best P4 nude female texture is, in my opinion, Staale's Vickybuster series. I used the default poser models and Eve (available from Morph World) for almost a year before I scraped together enough money to buy a little collection of Daz3D models.