This is going to be a great build, Tom! Congratulations! If you're looking for some additional low-end in your OM without having the guitar sound too boomy, the Kinnaird deep-body is the way to go. It'll come close to rivaling a dreadnought in some respects. I went to Dave's Guitar Shop yesterday and played a bunch of OMs - mostly Collings and Martins - and my two Kinnaird OMs smoked all of them, IMHO........
Enjoy the ride!