From what I've read; binding wise you might like the 390's more than the targas or the CO2's. AFAIK
the CO2's and Targas are stiffer, and geared towards back country type riding, but the 390's have the necessary flex for park.
personally, I like stiff bindings (which maybe why I'm no pro in the parks, lol), but if you like some flex, the 390's will be the sure ticket.
I'm gonna grab a pair of those hopefully at the end of this season on sale, to put on my park board.