Agree with Masaki, had I seen this earlier I would have told you to jump all over the Navigator suite - they are pretty midship and are really nice. We were on deck 9 in Canada/New England a couple of years ago and found it a great location. I peeked in the Navigator suites on disembarkation day and really loved them.
I'm sure you will enjoy your cabin though, as the "standard" cabins are quite roomy and nice and we had no complaints.