This is gonna be an odd ball suggestion, but I have a K200D and 3 of the DA Limited primes. I fit them all in a
Lowepro Inverse 100AW belt pack . I find it to be quite comfortable, easy to open in a pinch, and has 2 dividers (so 3 pockets). I usually have the camera sit on the dividers and leave the lenses in the 3 pockets. I am planning to have a specific setup on it so I can easily change prime lenses within seconds. More on that in another thread.
It also has an option to go sling bag if you don't want a 'fanny pack' style bag
But this is more designed to be a waist bag, that's for sure. The sling bag option is very useful when buckling or unbuckling the belt is too much of a hassle (or you're wearing a really long jacket).
The great thing is that, unlike a backpack or a sling bag, the weight is on my hips. This leaves my upper body with less weight on it (And no back sweat from the backpack). Once tightened properly, I usually put all my camera gear in it, swivel it so it's at my back and can run without it bouncing around.
Here's a review on it!