Not realy... you're better of with a Voodoo3 3000/2000 as they are better supported. The Amiga is the bottleneck, not the graphiccard, so you won't get any more speed out of it compared to the Voodoo3... and the drivers only support one GPU so the seccond one is unnused... and as the Voodoo5 split the mem 32Mb for each GPU you only get to use half the mem on the card.
Besides the card is humongos, use active cooling (2 noisy fans) and requier extra power plugged to it for it to run.