how about lowepro photo sport 200AW?
its has the following features:
- quick side camera access
- top compartment for personal stuff
- side pocket for water bottle --> important!!
- front pouch for maps etc
- hydration slot that can probably fit in a netbook or ipad
- many straps to hold/secure...
i am a newbie to photography but i have always enjoy cycle touring. my 2cts:
1) it depends on how far you want to travel. if you are just cycling within singapore, a backpack may be ok but i would hate to have any serious weight on my back for any trip >1day or >150km. for longer distances...