I'd go for the Ohlins SSie version were I to have any money left after my 748 forks, cyclecat yokes, MR bars etc etc....
I've got a Showa SSie shock on my SL at the moment and there's still no way the steering could be described as being quick.
Chris Kelley (Of
http://www.ca-cycleworks.com and
http://www.ducatitech.com/ ) sells a custon Penske shock for SS's that comes 1/2" longer than standard and has an additional 1/2" adjustment on top so...