I would agree with the posts above about getting as much education as possible before you start. My brother and I built a recording studio and there are many opinions about that topic. "Studio Tips" is a good source for acoustic information
http://www.studiotips.com/
You can spend a whole bunch of money chasing "theories". What we found is that having a room with the proper dimensions and acoustic isolation from other rooms and high quality construction techniques is key. Most contractors don't have the knowledge or desire to construct a proper space (too sloppy with air gaps for example). If you can help manage your room construction and are vigilant about using acoustic calk for air gaps, I think you will have success!
http://www.studiotips.com/
You can spend a whole bunch of money chasing "theories". What we found is that having a room with the proper dimensions and acoustic isolation from other rooms and high quality construction techniques is key. Most contractors don't have the knowledge or desire to construct a proper space (too sloppy with air gaps for example). If you can help manage your room construction and are vigilant about using acoustic calk for air gaps, I think you will have success!