Thanks for the congrate.
I have a lowepro SlingShot 202 AW with me for carrying my Canon 550D plus standard lens and 70-300mm lens. It is just too troublesome to remove the camera from the bag every time. As for the strap given by the camera company will feel aching after sling over my neck for a long time.
That is why I'm looking for alt to hold my camera for easy access.