Hamid makes a couple of good points.  My personal point of view is that the
extra drag of a vane system is not going to be critical and is worth the
other advantages.  If you are going racing, you can take the vane off
temporarily.

On the issue of icing, as far as I am aware, none of the AOA systems are
immune, including the Proprietary Software and the Lift Reserve systems.
However my pitot tube is heated.  If I am in cloud, I am not going to be
doing any significant maneuvering, and if there is a chance of ice, I will
trust the ASI.  As far as I am concerned, airframe icing is an emergency,
and should be handled as such.  An ASI failure in icing would be a double
emergency, and there is a limit to how far you can go to cover those.  All
flying is dangerous, the trick is to minimize the most probable risks.  By
the way, one advantage of a vane system is that at least you can tell if it
is affected by icing (it will freeze, pun intended).

If all else fails, set a known power and altitude or descent rate, and use
your experience of control feel with speed to get VFR or out of icing.

Jerry