Okay where are you going to fit two 240mm rads in a 650D... The monsta in the top would interfere with your mobo,,, and in the front you would have to mod the case loosing the bays in which you need for the res/pump combo.
A 240 rad in the top along with either 120 in the back or front (both front and back) would be about all you can fit in that case without modding in my opinion unless you are a wizard... the XSPC cpu block is good, I personally use one and I have 0 complaints.