Hiya,
I've got a A1200 with the micronick Z2 busboard too (actually it's a Micronik built A1300 or whatever they called their 'A1200 in a tower'). So far I've only used an Ariadne II in it, works like a charm.
What you wouldn't want to put in there is SCSI/IDE cards I think. The Z2 busboard doesn't allow DMA so it would be dead slow.