@Iggy I may be going to goodwill today to grab one of those G5 Powermacs to trial morphOS they cost just as much as a mac mini would off ebay.
Just make sure that the G5 has a supported video card.
These include the Radeon 9600, 9800, and X800XT.
All are more than adequate, but the last two do offer a performance advantage.
Under the latest versions of MorphOS you can also use a PC Radeon X1950PRO AGP card, but as that card incorporates a PCIe to AGP bridge chip (that slows it down) it doesn't offer any real advantage over the other two above.
And yes, MorphOS looks different than Amiga OS, and I rather like it (as Ambient presents a pretty cool desktop).
But everything works like it does under AmigaOS, all the controls, the presence of a RAMdrive, the major folders...
If you are familiar with Amiga, you'll have no problem using it.