Beginner Question: Turntable for CXA 81 Amp

[Surfingdave]

Hello,
I have zero idea about the best way to connect a turntable. My amp does not have a phono input, and I I understand I need a preamp.
Is there any disadvantage re sound buying a turntable with a built in phonostage vs a turntable and separate preamp?

I’m looking at either the CA Alva TT v2 or a Technics turntable (like 1200 mo7).

Thanks