20.0X Optical Zoom
20.0X Optical Zoom of Canon SX10 IS will give you a lot of flexibility considering this will be your only camera during the day.
Medium size Body
With relatively smaller body compared to DSLRs and better ergonomics compared to Compacts,Canon SX10 ISis a good compromise between size and functionality.
Carrying this weight all day may not be very comfortable for you. Body Thickness 87mm
With a thickness of 87mm,Canon SX10 IS is not a pocketable camera for sure. Small 1/2.3" (6.17 x 4.55 mm) sensor
Canon SX10 IS's small sensor struggles in low light situations compared to larger sensor. No RAW shooting capability
RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.