Some info on top of my head for following topics:
4) Sysinfo doesn't seem to give accurate info on drive speeds, and it does the same speed trickery on me too. Your Idefix is not faulty

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5) If you use Blizkick to load ROM-modules always state Setpatch NOROMUPDATE QUIET. And Idefix patches the scsi.device automatically so you don't have to remove the scsi.device module (i think).

IBrowse is either version 000 or 020. No 060 version.
9) You seem to be missing exec.library (from Boing Bag 2 if you installed it) from your BlizKick line. Just keep the scsi.device (as in answer 5).