this place has decent premium themes:
https://themeforest.net/search?utf8=✓&term=buddypress+bootstrap
you can also do a similar search query on the wp.org repository.
Thanks for the response I was looking for first hand recommendations.
Well any theme that i have bought for buddypress usage would be at least a year old (probably more) at this point and i not would generally recommend buying a theme that’s old since responsive design trends are still moving so fast. Sorry i cannot personally recommend anything but there are good ways to vet the newer themes as well.
🙂