Your winter tires size and brand

So I'm looking in purchasing winter tires for this upcoming winter for my just purchased 2010 MDX.

I'm thinking going with 17inch. Dealers says tire sizes should be 235/65/r17.

But looking on tirerack, they suggest 245/65/r17 instead of 235/65/r17 .:what:

So what do you guys have? and which winter tires are you rocking your MDX with?

Thanks