No need to narrow it down so much. For what you just said, get any of these:
-LL2s(2010 Nine Life?) which is what I got from my hutn for a jibby pow ski, message *SURFACE and ask if he has any left, and seanpistol too. They sell them cheap. There might also be a pair of 189s(your length) in gear swap.
-4FRNT 2010 188 CRJs
-EP Pros(although I didn't put them in the list of skis I was looking at for the same purpose as you)
-Moment Night Train 188.
-Moment Bibby Pro 186(the most directional maby, but before the night trains they were Moment's pow jib ski. great ski)
Those seemed to be popular choices..my preferance is a waist in the high teens, stiff, and longer(as far as pow-jib skis go) and I was offered 189 LL2s for $275 shipped, so got those. Marshal on TGR, who has skied lots of this type of ski, said these were the top three pow jib skis out there(in his mind): 1) CRJ. 2) Night Train. 3)Bent Chetler.
I skied chetlers and found them fun, but a bit too short(in pow) for me. I like any non-park skis to be long though(sold my 194 chargerish ski, replacing with 195ish 333 total charger pow ski). here is the thread I was talking about: http://www.tetongravity.com/FORUMS/showthread.php?t=156125 which told me not to get ARGs.