I want to be able to mount a Kraken X40 or a X60.
The Corsair 650D does come with a HDD caddy, look closer. Read through the link you've posted, Cooler Master 692 II = CM690 II Advanced, it will fit. The link you posted mentions both cases will fit but the Corsair 650D will need minor modifications.
Where did you find the X60? I can't find one anywhere.