I have two MDDs :) one is for os9 with GF4600ti second is also for MOS, with Radeon9000.
You can choose Radeon9000 for OS9 and MOS (especially version with 128mb) - working 3d with MOS and OS9.
Radeon 9600 also working on os9 but without acceleration.
here you have all possibility and ROMs
Beautiful beasts!! My MDD already came with Radeon9000 pro, but only 64mb. Thanks for the link btw!