First of all, I just got my V4.5 but i perfer it more. I like the game, new charicters, and skill point chart, but thats my opinon. I also like the new desines, but i also know a lot people who like the V4 more. There basicaly the same...just a cuple of slight diffrences.
Eather one you get, the both fun. But I think there both difrent and funner than a v3. Like you can go to school, get jobs, new charicters, and skill points, and new games. I wouls save up to get a new version but also keep my v3, you can connect them together.
Seconed of all, I think this should have been posted in whats on your mind or something like that because this is not a question about your tamagoatchi, it's more on a tamagotchi.
Hope i helped,
Love,
~^TamaNoItAll^~