This is an individual decision and you won't really know which you like better until you've tried both. Sounds like you've done the individual tent route, give the tipi a try and see how you guys like it. If you don't like it, resale on them is high enough you'll be out very little money.
Personally, I've done both and much prefer to have my own sleeping space. I sleep better, it's more organized and it gives me the ability to pack up my shelter and strike off for a day or two on my own to chase animals without leaving the others high and dry.
Personally, I've done both and much prefer to have my own sleeping space. I sleep better, it's more organized and it gives me the ability to pack up my shelter and strike off for a day or two on my own to chase animals without leaving the others high and dry.