The Amiga is not all about the OS, it's very much the hardware too that makes Amiga.
My suggestion:
enhance/change the old custom chips to newer/faster/better ones, but preserve compatibility with classic-side (68k) games/apps/utils. Better soundchip, graphic chip (NO interlace), PCI-E place for new graphics cards, sata hd controller + add many of newer things (usb,bluetooth etc.). You get the picture. The "old" is still there coupled with loads of recent hardware features!. And possibly stacked in a nostalgic desktop-keyboard case like A1200 or maybe even A4000

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Now THAT I'd buy for a dollar ! :banana: