Chris, just a suggestion from a 2-lug M5 fan [and I've had both]. Before you do the automatic thing and get a 3rd lug, try the camera out with the vertical one side strap arrangement. Although the 3 lug design does give you both options, and for some folks the horizontal just seems more natural, I find the original design 'bare to the hand' shutter release side a plus. Its an uncluttered hold and no strap in the way. I use a long leather strap and carry the camera at the right side low with the strap across my back/chest which takes the weight off, is very comfortable, and stops it from falling forwards if you bend over. Its very easy to bring it up for an exposure this way, and still have some tension on the strap for a steady hold. Also if you get a continuous strap that goes through both lugs [and across the battery compartment] you can arrange the camera better, keep the pad on your shoulder but move the camera on the strap if you want to the front, or even on your back to get it out of the way.
Very cool camera, you will love it.
