About pullips/ Obitsu's

okay,id like to have any kind of information and web-pages about pullips, or obitsu's. id like to have pullip for christmast but i dont know much about them. this is gonna be my first pullip, so what kind would u recommend? like pullip's head in pullip's body, and what model, or pullip's head in obitsu body and how does that work, which pullipdollmodels head is possible to attach in obito's body, and if i have obitsu's body, will it become too weak if i have pullips head attached in it and obitsus weigh is 27 not 25? also, 2004 published pullip's body type2,venus, is it good, what are its weaknesses, like wrists or neck? please somebody who got time could u help me? cos i really know nothing and this is my first pullip (づ￣ ³￣)づ