You have chosen three desirable cameras.
They all have great lenses and take sharp photos.
They are not meant to be in competition with each other.
The S500 is a great point-and-shoot camera.
It has some scene modes that let you control some special situations. It is small and pocketable.
The A95 is a great intermediate camera.
It can operate as a point-and-shoot camera in automatic mode. It also has all of the desired manual over-ride controls for the user who wants to get more involved with photography.
The S60 (there is an S70 now) is one step above the A95 in diversification. It also offers a wide angle lens and is considered the small (physical) cousin to the Canon G5 (there is a G6 now).
Some people don't want the manual over-ride controls. They want something simpler that takes good sharp photos. That would be the S500.
Some people want good sharp photos. They alwo want to be able to use the camera under adverse photographic situations, control depth of field and create special effects. That would be the A95.
The S60 has a wide angle lens which is helpful when photographing a lot of people in a small space. If offers a few more manual controls than the A95, and offers the uncompressed RAW mode. It almost equals the G5 in manual controls. It has a bit more optical zoom (3.6X) than the other two cameras. It is a tad larger than the A95.
Here is a comparison chart of the specifications:
I am planning to buy a canon 5MP digital camera, out these which one is a good one. Please carify in detail with reasons.
Canon powershot A95,
Canon powershot S500 and
Canon powershot S60
Thanks in advance