> If you want I can run some specific ones on my X5000, but only under MorphOS control.

Thanks for your kind offer. I'm interested in these:

dnetc
http://http.distributed.net/pub/dcti/current-client/dnetc-morphos-ppc.lha
(Run as "dnetc -bench".)

RAGEMEM
http://os4depot.net/index.php?function=showfile&file=utility/benchmark/ragemem.lha
(requires OS4Emu)

AmigaMARK
http://www.219.dic.at/data/projects/native/AmigaMARK/AmigaMARK-morphos.lha
(You can omit "Hard Disk" benchmark if you want.)

nbench
http://amigadev.free.fr/powerpc/nbench_mos.lha

stream
http://aminet.net/package/util/moni/stream_mos

monolith
http://aminet.net/package/gfx/3d/monolith
(It's software rendering, so benchmarks the CPU.)