Oh, so you want all mountain, but soft enough for occasional park? Hm, yeah, Custom. I ride a pair of those puppies, old school disk, from about 2009-2010. They rip it in the park, but can work nice for everything else too. I'd still recommend the Re:Flex version, if you can get your mitts on it.
Even if you're not riding park all day you still generally want the binding flex to be close to the board flex. If you can get an awesome deal on a pair of Custom's, then sure why not buy them. But they aren't as good a binding as the Raiden Zeros. Raiden also offers a two year warranty compared to the one year warranty by Burton.