Contemporary a cappella is an ensemble art. When you isolate each singer to get the "best" performance, you have just removed one of the most important aspects of a cappella -- the ensemble. There is no longer an integral relationship or interaction between the singers. Additionally, current a cappella studio productions techniques can easily sap the nuances (yes, even imperfections) of pitch and dynamics that give character, power, and individuality to your performance.
If you want an album with energy and emotion, record together as an ensemble. This is standard practice with classical vocal ensembles, and it is also found frequently in the jazz and folk community.
Does the recording actually sound like the you, the Dynamics?