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.
AmigaOS: Pegasos II, Sam440ep-flex, Micro A1-C, AmigaOneX1000
MorphOS: Pegasos II, Powerbook G4, iMac G5, Powermac G5 Quad