Sony Pentax

Sony Pentax
Which of these camera brands have the best qualities?

Which of these camera brands have the best qualities? What has higher battery life, image quality and so on .. Sony, Canon, Casio, Pentax, or (please, only these four) Thanks:)

I have used Canon Powershot SD780IS JST pride and incredible image quality. You can read his views on http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http% 3A% 2F%%%% 2Freview 2Fwww.amazon.com 3Fie% 2FB001SER47Y 3Dcm 26ref_ 3DUTF8%%%%%%% 255Fcr 255Fpr 255Frecent 26showViewpoints% 3D0% 26sortBy 3DbySubmissionDateDescending & tag = wwwbestdisc08-20 and linkCode = UR2 and camp = 1789 creative = 390 957

Photography Lessons: Which Camera System Should I Buy?