don't worry, you'll have way more float than you need with a 160. I bet the 156 would work for you too, if you wanted. I had both the 160 and 156 at my house last month and I felt if I was buying one I'd get the 56 for sure. The nose is so damn long! I can't remember exactly, but look on the Jones site, it says the surface area of the 56 is the same as a 172 or something.
I'd say the 56 floats as much as a 160 fish, yet it also rides like a regular board. It sounds like the perfect split. I might try one later in the season. My buddy, who rode 162 t6's and 64 custom x's got the 56, but he finds it too big and has ordered the 52.
Then again, you'll be totally fine with the camel toe's base.
You're overthinking this. Just go with the one that stokes you out the most. Both will kill it in the pow.