Yamakawa+Sanyo Z2 : should I buy R1 dvd´s ?

Hi

Sorry for the English post but this seems a good forum to clarify the following:

I am a proud owner of the combo Yamakawa 365 + Sanyo Z2 and
I am using a DVI connection. I watch R2 Pal dvd´s.

I am using the latest Yamakawa V.271T firmware that as far as I know supports 720/50HZ output for Pal.

As far as I know the sanyo Z2 don´t accept correctly a 720/50 Hz input.

I ask?

1) Are there any visible problems with 720/50 Hz input using the Yamakawa+Sanyo Z2?

and

2) Are there any real differences in the image beetween 720/50 and 720/60
input using the Yamakawa+Sanyo Z2?

or

should I buy R1 dvd´s ?

Thanks

Edgler