A520
I have been personally using it for the past six months and I can say thats its not really for point and shoot photographs as said by medpal.
Its a powerpacked camera with lot of features some of which I still havent explored , as its made for every different situation like fireworks, underwater photography( usig the cover , not provided by default ) etc .
And the picture quality is also very good . Its a 4 MP camera and its really worth the price.
However you can even consider A510 as the only major difference is 3.2 MP . (Not sure if thats the only difference as I dont remember now its six months old.)
So I would give you a go ahead saying that its really good.
Just to borrow Canon's line which I love,
Every shot is a powershot
Cheers!!!