@Red
Bus performance is *extremely* important for 3D applications on existing classic amigas using eg Warp3D.
The faster you can shovel data to the card the better. All existing voodoo3 cards (and believe it or not, even the permedia2 half of the time) can consume vertex data at a much faster rate than the bus can deliver it. On slower 680x0 systems you tend not to notice since the CPU is the bottleneck, but with faster CPUs (eg the PPC and fast 060's) the bus becomes the dominant factor in 3D performance.