Replying to AR5 vs. ARV all around

i know this should be in ski equiptment, but it didnt get the recongnition it deserved.
im 5'5 145lbs, and i was considering this year AR5 and the ARV, i ski 70% park 30% anywere else. i know the ar5 is probly the sickest park ski, but how would it be compared to the arv in park? i know the arv would be great anywere else, but how would the ar5 do. would the wider ski would be better for stomping landings?? thanks.
and also, should i get the 165 or 175 arv, the 170, or 176 ar5.