The XA160 monblock has balanced and single ended inputs.
The XA series provides both the slam of the X Series and the the wonderful midrange of the old Aleph series. You will get considerably more slam from an XA160 than the aleph 1.2's. I've owned and used both the alephs and the X Series. (I'm a pass labs dealer)
I have tried the X series with planars (magnepans), and found them to be great match. The extra power and the natural timbre really light up the maggies. Honestly the midrange on the X series is excellent. It is not warm nor cold, but it is very natural, liquid sounding and true to the source. The aleph series were definitely a touch on the warm side.