Replying to Need some tips...please

i just ordered 07/08 chronics from lineskis and there on backorder so i can cancel the order when ever i want
i was wondering if i should get the invader instead because im going to be skiing 80% park and 20% the rest...
i ordered 166 chronics but i was thinking about getting 171 invaders because center mounting makes the ski seem shorter
should i save the money and go for the more park ski...invader
or use the money for the all-mountain ski...chronic???