which social network builder is better in your opinion?

I would like to see people's opinions on boonex dolphin, elgg, & joomla's community builder. I am leaning more towards boonex dolphin, but yet elgg seems like a good alternative. I could not find a demo for joomla's community builder extension. Thanks. I like Buddypress on Wordpress however it doesn't have all the functionality that I would like.

 

Thanks,

I will check it out