I thought this thread might be a good place to mention to any M owners that I put a Fotga glass screen protector ($4.65 on ebay) on my M without any perceived loss of sensitivity to the touch screen. I am frequently sliding the camera in and out of my cargo pants pockets and was a little concerned about scratches since I hate crying like a little girl in public. The OEM screen is better as it is less reflective and does not show fingerprints as much, but I value the peace of mind a glass protector provides.
And now back to replies that may help the OP...
Your post is fine for this thread, thank you for sharing the info!