stay with P4.. the only real feature that's hard to live with out is the librararies in p5...as far as dynamic clothes, hair room,face room,.. well they where fun for a week or so... they work.. but don't add any value to the project.. the only problem i find with p5 is the speed.. if you do alot of global illumination renders 10+ light calculating shadows.. be prepared for twice the render time.. with no incraase in render quality..(i'm not talking firefly. p4 render in p5) that's my 2 cents.