I've never read a convincing description of a utopia that works, not even close; they always succeed by creating stratified classes. And even Walden 2 is just a fantasy; it's never succeeded in the real world.
For Walden 2 to work you have to buy into Skinners notion that behaviorism is a complete system for behavior modification, not something that a lot of people do anymore. And if I remember correctly he even added some seeds of doubt that it will work in the book. Although I could be wrong as I read that book 25 years ago.
Have you read Aldous Huxley's book "Island" (no, that cheesy movie with the same name from a couple years ago is not based upon this book)? Probably the best of the utopia models although in the end Aldous made sure that it fails. Another good one is "Ecotopia" by Ernest Callenbach. Seems rather relevant today.
"Brave New World" is perfect, as long as you take your Soma...
Aldous Huxley also wrote the distopia "Ape and Essence" a post W.W. 3 world. As you could expect its pretty dark.