hana sl or one of the AT-ART9?

i read that the  original ART9 was DISCONTINUED.
there are two other options.

AT-ART9XI with Output Voltage 0.5 mV (1 kHz, 5 cm/sec.)
and AT-ART9XA with 0.2 mV (1 kHz, 5 cm/sec.)
the lower output is a bit worry me.
any insights from members that tried both?
or there is still a way to get the ART9