* Double DIN vs. Single DIN: BA Falcons generally have a double DIN dash opening (meaning it's twice as tall as a single DIN unit). While you *can* fit a single DIN unit with a filler plate, a double DIN will fill the space more neatly.
* Features: Do you want Apple CarPlay/Android Auto? Navigation? Bluetooth? More powerful amplification? Specific audio processing features (EQ, etc.)? The more features, the higher the price.
* Brand: Many reputable brands make car stereos, including Pioneer, Kenwood, Sony, Alpine, and JVC. Research reviews to see which brands have a good reputation for reliability and sound quality.
* Installation: Some units are easier to install than others. Consider if you're comfortable with the installation yourself or if you'll need a professional. You may also need a wiring harness adapter to make the connection easier.
Before buying:
1. Measure your dash opening: Double-check that the head unit you choose will physically fit.
2. Check wiring: You'll likely need a wiring harness adapter specific to your BA Falcon XR6 to connect the new head unit to your car's existing wiring.
3. Read reviews: Look for reviews on specific models to get an idea of their performance and reliability.
In short, there's no single "correct" answer. Research different units from reputable brands, considering your budget and desired features, and then choose the one that best suits your needs. Visiting a car audio specialist can be extremely helpful in making this decision.