This is a tough decision dude, really should break it down though. With the chronics yoru really looking at a tried and proven all mountain ski, i loved mine to death and after getting 08 invaders,I seriously( even still) wish i would have gone with chronics instead( i also ski about 80% park and 20% all-mountain) The chronics are alsobeefy from my experience ,although some did say they had issue's with the sidewalls( i cant really vouch for this, ive had no troubles) As for the after bangs your looking at totally new technology that has not really been around enough to give it the thumbs up or thumbs down yet( although it has been 4 years in the making so this does tell you something about its credibility) Also it is 20% allmountain and 80% park ski, which is exactly what your looking for, but your realyl still getting more of a rail ski. There have been some outstanding reviews on the afterbang but ive also heard people who werent too happy with them because of chipping and what not.
Alternatively, you could look at anthems. There wide underfoot makes up for the softness of the ski and gives you a still very fun ski on rails (just like invaders/ afterbangs) but it really holds its own on jumps and everywhere else on the mountain. i might not recomend it if you live on the east because the wideness of the ski mixed with icy conditions isnt always such a good combo but i stil know people out here who shred on them.
You cant really go wrong to be honest, both of those skis( or all three if you consider the anthem) are good for what your looking for, either way youll have a good time on the ski's and your going with line which means great customer service.
Hope this helped.