Read the fine print of the Courts offer. Usually they bundle in their 3 years warranty, covering also damages out of clumsiness and other things, just like an insurance. In return, you will need to go to Courts for all warranty issues. Canon Service Center will not acknowledge the Courts warranty contract. If you feel you need the 'all round clumsiness protection' then go ahead. But bear in mind: you buy consumer electronics. Values drop by the month, latest when the next model comes out.
Buying from other shops gets you the standard Canon warranty which you can extend when registering online. (Check Canon SG webste). Some shops also offer grey sets (a.k.a. export sets) which are not covered by warranty from Canon SG. They are cheaper, of course. But you will have to pay for every repair, regardless whether it happens 2 weeks or 10 months after purchasing.
Decide what you really need.