Some more tips, if you didn´t know this... you can only have 8MB ram on the ZorroII so if you have an rtg with say 4MB then you can only have 4MB extra ram on a GVP for instance. But you will overcome that with an acceleratorcard, that is you can still only have 8MB on ZorroII but you can have as much ram as the acceleratocard can take.
For a good SCSI-card I would go for the GVP HD+8, it´s easy and works with most other Zorro cards. But if you find a Blizzard 2040/2060 then I would go with that because then you´ll have SCSI2 with 10MB/s. :-)