Do I need a wide board?

I'm in the process of buying my first board. I already bought a pair
of size 10 Flow Apex boots and a set of Large Flow Pro 11-FR bindings.

5'7"
weight averages 160-165

I was interested in the Burton Clash for my first board, but their
specs say it only takes a Medium binding so I've removed it from
consideration.

If I'm getting a wide board, I'm looking into a 156 Burton Canyon or
maybe a Gnu High Carbon (157W).

From what I've read, you sacrifice some maneuverability with the wider
board but they handle pow better. If I don't have to get a wide board,
I'd rather not, since I'd rather have the maneuverability, but if a
wide board is more suited to my size, I'm all for it.

Any input?