WIth a budget like tat, i think u should consider Canon ixus series...like Ixus800IS or Ixus 950IS. Pretty good stuff-good performance, responsive and good image quality and also small size.

I have a sony W-55 but not happy with the image quality in low lights condition. Nikon, Pentax you would have to find out for yourself. FUji cameras are not bad also.... looking at reviews Fuji F50fd as a highly recommended one-good image quality-good image sensor.. performance wise so-so. I think u should check it out.also.