Over the past week, another teardown of the Apple TV took place, revealing the presumed costs of both the 40GB and 160GB models’ parts, and implicitly Apple’s profit margins for both devices. The conclusion reached by analysts: Apple is aggressively pricing Apple TV given what’s inside, and the 160GB version yields more profit than the 40GB version, even when Apple is buying the 160GB drives and installing them at the factory. Once…