Well, J-Mo will be the best, im not a On3p guys and i never recommend them because i didnt try them but they will be the best for you. Since they are sold out, maybe wait till next next year? If not. Im had the same dilema as you and i buy Some JJ's, best ski for all-around in the west, except park... So ill toss some brand and some ski that i didnt try.
Rossignol - S3, good one quiver, according to the specs but the review are not all good, some loved them and some hated them.. S5 will be good aswell, nice ski whit 96mm at the wait, still good in park ( i have kung fujas and they are 95mm, and they rip park.) S6 will be more powder oriented, 115mm underfoot i think? cant say much.
Salomon- 2012 will be good 92mm at wait tip/tail rocker and you mount them center, great one quiver ski, but you loose some flotation. Good ski for the east, they are my next year ski, im stoked. Shogun will be good, but not in park, they hvae a small rocker and they hold up well at high speed. Salomon rocker2 are nice, The 190cm are 115 at the waist, they are playfull and have tip/and tailp plus honeycomb construction in the tips.
K2, The Kung fujas will be very good, i have the 09/10 and they do well in pow, so the new one will be better, plus if you mount them whit schizo, you will be in business . place them center in park, -3 in pow. Cant say much on the rest off their line, i just skied the old obsethed.
Line - never ride their ski, but next year line is killer, Sfb 108 mm at waist, blend are their one quiver ski, and the prophet line looks great. Take a look at them.
Moment- NExt year pb&j i think are 101mm at wait they look nice, plus they have mustache rocker whit camber.
I'll stop here, but its all depend if you want a ski very good in powder and trees or something for all mouintain and park. Do you bring 2 pair of ski out west? ( pow and park) Stiff or soft ski ?
Me when i had to choose, i buy some JJ's besause i was going in Utah for pow and want too live this moment the best way possible whit nice ski, and i had the best 6 days of my life. Plus JJ's are very nice on east coast pow day, so i ski them like10 time here.
Sorry for the really long replys. and if you have question on the JJ's pm me .