Dave is right about that. The 8500 is the fastest card currently supported (faster than the 9000-9250).
I downgraded from an 8500 to a 9250 to get the extra memory. I'm not sure how well a 128MB PC 8500 (when re-flashed) works under MorphOS.

BTW - The Apple 8500 I bought on Ebay was only $10. I haven't seen one that cheap recently (and mine eventually died). However, they're not expensive cards.

[ Edited by Jim on 2010/9/10 19:48 ]