The CybervisionPPC and Indivision combo is fine, but you'd need some sort of switcher. Bonus of the PIV is the auto switching between Amiga and RTG modes. Of course, the CV64 does have a passthrough so you're set there.
I'm of the opinion that just about any RTG supporting either CyberGraphX/P96 is great, but autoswitching cards are on the top of my list.