Thanks for all the great responses so far. I've been doing some more research into this and it seems that anything before 1998 is very likely to be SCSI. IDE would of course take a lot more processing power from your pc than SCSI, so I guess that makes sense for burning CDs.
I have thought about the SCSI option but there are a few drawbacks. My system has no more free PCI slots, so it has to be an 16 bit ISA card.. they might be hard to find (for a reasonable price) and secondly, the system is filled with cards and I've put in an effort to make it all work in DOS and WIN95 without any driver or I/O conflicts. I don't have much experience with SCSI controllers, so I'm not sure what potentional problems that's going to cause. IDE would be so much easier to work with.
Maybe someone with more SCSI knowledge can enlighten me. Does a SCSI controller card use an additional IRQ channel? Is it likely to work in DOS? I've also seen a SCSI to IDE convertor, which was just a small pcb with the different connector types on it. Would that be enough to get it working with IDE? Somehow seems unlikely to me, if you normally need a seperate controller card.
And the concern about it still working is an issue too, of course. While searching I found a bunch of old forum threads about CD writers breaking down within months.. some brands and types named more often than others. But yeah, it's always a bit of a gamble when you deal with old computer parts, so if it's not too pricey I'm willing to take a risk.
Anyway, thanks so far and keep those suggestions coming! 😀