I was going to say Microcosm, may not have the best game play but graphics wise for a basic AmigaCD32 I think its the best their is. Rise of Robots also looks good, but unfortunately plays even worst!
Clickboom games where all of high quality too, Napalm, T-Zero, and Capital Punishment.
Another game I only found played a few months ago that has quite a nice stly graphics to it is Blade Warrior, game play not amazing, but worth taking a look (
http://www.youtube.com/watch?v=lgIKO8uG6lo )
