I know Castlevania Chronicles, of course. I even played it on the PS1 back then. My favorite part is Symphony of Night. I think their AGA version looks even better than Chroinicles. Well maybe this is possible with the CDA tracks in the future. The CD32 even offers the possibility to save game saves in the NVRam. Earok is an expert in this area. He could certainly help.
I hope they finish the project, a good Castlevania port is missing from the Amiga.