All Cameras have Face Detection technology and a generous 2.5" LCD screen and Optical viewfinders. The more expensive the camera the greater number of features and performance the camera has. All the cameras use 2x AA batteries(except A650IS which uses 4x) so are compatible with readily available AA rechargeable batteries.
Canon A560(
http://www.amazon.co.uk/Canon-PowerS...5946381&sr=1-1) £61.95 delivered
Easy to use Mode dial
7.1 MP and 4x optical zoom
DIGIC III
9-Point AiAF and Face Detection Technology
ISO 1600 and High ISO Auto
2.5" LCD screen
14 shooting modes and My Colors
VGA movies with sound
PictBridge and Print/Share button
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Canon A580(
http://www.rankhour.com/view/index/p...60637713073001) £66.99 delivered
8.0 Megapixels
4x optical zoom
Motion Detection Technology
Face Detection Technology
Red-Eye Correction
DIGIC III and iSAPS
2.5" LCD and OVF
16 Shooting Modes including Easy Mode
VGA and LP movies
PictBridge and Print/Share button
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A590IS(
http://www.rankhour.com/view/index/p...70070005125430) £79.99 delivered
8.0 Megapixels
4x optical zoom with optical Image Stabilizer
Motion Detection Technology
Face Detection Technology
Red-Eye Correction
DIGIC III and iSAPS
2.5" LCD and OVF
19 Shooting Modes and My Colors
VGA and LP movies
Range of accessories
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A720IS(
http://www.jessops.com/Store/s66576/...a/details.aspx) (remember to add £10 discount for Jessops) £109.99 delivered
8.0 Megapixels
6x optical zoom with optical Image Stabilizer
DIGIC III with Face Detection AF/AE/FE and iSAPS
9-point AiAF and FlexiZone AF/AE
19 shooting modes
2.5" wide-view LCD
Digital Tele-Converter and Safety Zoom
ISO 1600
Smooth VGA movies
Range of accessories
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A650IS(
http://www.rankhour.com/view/index/p...33406610046326) £142.95 delivered
12.1 Megapixels
6x optical zoom with optical Image Stabilizer
2.5" vari-angle LCD
DIGIC III and Face Detection AF/AE/FE
9-point AiAF and FlexiZone AF/AE
21 shooting modes
Digital Tele-Converter and Safety Zoom
ISO 1600 and Auto ISO Shift
Smooth VGA movies
Range of accessories