With the cashback yeah. BUT I'd wait until the other suppliers offer the cashback. Keep your eye HERE.
Actually looks like as long as you have a receipt you can claim the cashback from Canon. If that's the case, I'd check the T&Cs, you could get that for under £400 delivered easy.
Ok I'm bored so I read the T&Cs. It's only authorised retailers. Which Amazon is one of. So you could get it for £388 delivered, which is a fucking uber bargain if you've got the cash spare to spunk.