The advantage of Yamaha's Super Articulation, and to an even greater extent, SA2, is that you don't need to use your left hand to give the voice it's expressive qualities....although, you can, if you wish, and thus add even more nuances.
I don't believe there are any arrangers with a pitch strip...I used one on an old Yamaha CS-80 we refurbished, used in the studio for a few years, and then sold...it was très cool....also had one on a Moog Polymoog, and a Moog Multimoog.
There used to be a stand alone pitch strip available quite some time ago...made by Kurzweil called the Expression Mate. You plugged it in a midi port, and it attached to the panel....probably hard to find one of those today.
[This message has been edited by ianmcnll (edited 09-29-2009).]