kinetik batteries are great as long as you aren't beating the hell out of them(draining them to 11v regularly).
w/ the hc16v's if your drawing from the 12v post make sure you parallel all the 12v post's as well as the 16v posts. When i first put my hc16v's in my explorer the one under the hood was the only one seeing a 12v draw and it was just too much for one battery to step down.. now that i have all the 12v posts connected i'm not having any problems.