So, here's the question, is the Navigation/radio backwards compatible with the 2004 Crossfire?

As for no manual tranny on the SRT6, I'd reserve comments until I drive it. F1 cars have sequential gearboxes, so do some serious sports cars like the Aston Martin Vanquish (which they call manual but it uses paddle shifts like F1 cars and like F1 cars, I believe the Vanquish as a clutch), they can be as good if not better than manual transmissions, it really depends on how they are configured, programmed and set up.

The real issue isn't automatic or manual in the old sense of the word, but how much system intervention between the gears and the driver. Sequentials can be as effective as manuals, it all depends on the engineers and how they think their customers want to drive it.