In some ways the X1000 was superior to the X5000. For one, it has more PCIe lanes. And I believe the PA6T supports AltiVec.
I completely agree.
and MorphOS was opimised for AltiVec from beginning.
AmigaOS3: Amiga 1200
AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, AmigaOneX1000
MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad