I wonder if you could use the empeg with an FM modulator and have it powered... somehow. You could control the empeg with the remote. Or, even get a custom remote with a more tactile-feedback-sensitive layout and program in the features you want to use. Or use the up-and-coming remote display taped to the dashboard? Mount it in the glovebox and run it as auxilary to the Bose HU?

Ah, just my usual flurry of half-baked ideas. I'd vote for yanking the Bose, selling it on EBay, and mounting the Empeg and a top notch AM/FM/CD in the second DIN slot.