I just purchased a Black Rapid-4 strap. Without a doubt the best camera strap i have ever owned. I have a t2i which is fairly light and my lenses are not very heavy at all. I have no concerns about the tripod mount braking. My concern was always and still is about the screw working its way loose. To solve this i have a safety strap from the post to a non breakable part on the black rapid setup. I feel very confident this will more then do the job.
only downside is that when i want to use the tripod i have to take off the screw and attach the QR plate