This paper discusses the architecture and acoustics of two of the best concert halls studied by the authors for South Indian Classical music in Chennai, India-Sathguru Gnananda Hall and IMAGE Auditorium. The concert halls have been modeled using CATT-Acoustic software and their acoustical parameters, which include Reverberation Time RT, Clarity Factor C80 and Strength G, are presented in view of understanding the range of conditions that are found in good concert halls for South Indian Classical music.