As several folks have asked me to pass on the recommendations I received for reliable/reputable chimney companies:

American Chimney & Fireplace (2 recommendations)

http://www.americanchimneyandfireplace.net/

 

Advance Chimney Sweeps (800) 822-2131 (2 recommendations)

 

Anderson Chimney (412) 779-7529   - (2 recommendations)