By the sound of that errorcode it can be anything between poor RAM connection (give them a little wiggle), semi-attached HDD cables (give them a push), to overheating the 68060 (ouch!). Or redundant/bum driver software (possibly Amithlon drivers). Instability with random gurus is often caused by hardware problems.
So take some time to check out the usual suspects. That bundle of expansion cards does not exactly help your situation since each and every one can cause the havoc. Remove everything you don't need to boot + get visual and see if it works (Amiga+arrow keys get you basic mouse control). Also, the order of driver activation may be significant so try shuffle those around.
If AmiDock prevents you from doing anything then use ctrl-c to abort the startup. Then move AmiDock from the autostart directory. At command line: rename "sys:autostart/AmiDock" "sys:storage/AmiDock" or whatever path applies (memory fails me).
Also, if you only have one large 80GB WB partition - or the WB partition isn't <2GB and first in line - then the answer to your problems is simple.
-- edit --
And, oh, I forgot to mention one major culprit: stack. Some stuff needs a big load of stack or else the Amiga will guru at any given point. It's a nightmare to sort out a stack problem though. Try booting without anything in the autostart and not running any apps. Run around like a squirrel in the shell and see if it remains stable or not. If it does remain stable then it's probably a stack related issue.
