I love that corsair water cooler, it is the same one I have in my machine. Probably one of the best investments I made. Thats a damn good price too I paid $99 for mine. I saw you bought the other case fans, those should still fit into the machine. Cases today have multiple spots for fans. I know my case can fit like up to 6 or 7 fans. You should be fine with the ones you bought. Flip one of them around to pull air out as well.
I typed that out above this post before reading this. My case comes with 2 120mm fans on the front preinstalled, 1 120mm fan on the back preinstalled, and spots for a 120mm fan on the bottom, and the top spot is kind of interesting. Can fit a dual radiator, or a pair of 120mm or 140mm fans. May want to take a look at it. Will be clearer than me trying to explain it. Or maybe this Asian Lady can do a better job. (Skip to 2:48)
So what I need to know is:
A) Do I get a single fan radiator and an extra fan? If so can my 140mm fan fit in with the 152mm radiator?
B) Do I get the 275mm radiator and fuck both the fans?
No risk in overpowering no, however you might notice a kick in your electric bill believe it or not 750W is a beast. You will be fine though otherwise.
Uggh...that sucks.
According to the features list on NewEgg, the power supply I bought has:
ErP compliant for low power usage in standby
Active Power Factor Correction (PFC) to effectively regulate input voltage
Think that'll help? I don't really understand what that means, but it sounds to me like if I'm only running 450W worth of equipment, it will correct the wattage to that? Hopefully that will pull my power bill back to around where it would be with a 550W. Maybe not. I dunno.