I can only comment on the Charger 15. I am very happy with it. I have owned allmost all models of PL kites from Guerilla 1 on. The Charger is for me lightyears better than Synergy. Much quicker turning, better lowend, lower bar pressure, higher internal pressure compared to previus models,...
I am using ARCs and also Tubes (SLEs). In the past few years I was kiting in the water mostly with tubes, but from when I got the Charger I have flown a tube only once, just to make a comparison, but I liked the Charger more.
Just to be celar - I am not interested in wakestyle and unhooked, so I can not comment on this aspects. I like freeriding, big jumps, hangtime, floaty jumps, low wind kiting with a raceboard and oldschool trix.
If you have never flown an Arc, I recomend you testfly the Charger first (that should be done when buying any kite I guess
). If you are allready an "ARCuser" I am sure you will love the Chrager!
Hope this helps,