really it would depend on what OS you are running, i know that in tiger 10.4.3 (or 10.4.2) OS X gained support for the DVR-110/110D (the D version is the cheaper one of the 2). i know that my friend bought a DVR-112D for his Mac and he runs 10.4.10 and its supported (cant tell you when OS X gained support for it). my DVR-110D is OS 9 and OS X bootable, my friends DVR-112D is fully OS 9 and OS X bootable.
the only issue was that in a Beige G3 the DVR-110D had issues booting OS X, but the same drive in a newer machine boots OS X without a hitch. and out of the box the DVR-110D and newer versions don't have burn support in OS 9 unless you mod the PioneerCDR Authoring extension. since you have a digital audio you wont have booting issues. the only issue you might have is lack of burn support in tiger (maybe, if the drive came out before the last update it might be supported, if it came after then it might not be supported).
if its not supported to burn with there is always patchburn.
Pioneer drives are real nice.