AmigaOS is still available and able to run all your Linux favourite applications as well as 'classic Amiga software', except of course it requires you to be running a PPC processor. Plus it costs money. So you'd have to invest £lots in 'most of a new PC' to see whether it even works for you.
Now, if we could open-source it and get it running on x64, I'd love to be running workbench again. It was ahead of its time.