Second tonearm / cartridge

Hello

I have finally decided on upgrading my turntable to Kuzma stabi R with twin arm boards : one will fit my 4point11 with existing Etsuro Cobalt MC, I would like to add a second arm/ cartridge hopefully can give me a significantly different flavour to my first arm/cartridge , preferably more bloom, sweet/ warmth vocals mostly for pop/ soft rock musics. Ideally with the tube-like vocals and punch / dynamics.
My dealer suggest an SPU head, paired with Audio Creative (GrooveMaster) tone arm.

Can anyone recommend me something to fit the request ? Which SPU would you recommend ? Ortofon Royal?
thank you 🙏🏻