There are two good audio retailers in north Dallas near each other on Preston Road just off of LBJ Freeway.
1. Hillcrest High Fidelity (hillcresthifi.com)
They cary Krell, B&W, McIntosh, etc.
2. AudioConcepts (audioconceptsonline.com)
Linn, Proac, Acoustic Research
Enjoy the heat!
Joel