you might want to look at this;
http://www.xtremesystems.org/forums/showthread.php?220874-More-Radiator-Sandwich-testing
you'd be better off with a single radiator with push/pull than having 2 radiators sandwhiched
Thanks, Andy! That's actually a really interesting read, especially with so many configs being tested. It seems like the higher the rpm on the fans, the smaller gap in temps between setups. I'd call 2 degrees quite a difference still. If I do decide to go for the stacked method, it's worth noting that the flow will split before the two rads and join back after them and part of this is simply to see how it would perform. If not, I'll have push/pull on both of the rads and place one of them at the bottom of the case. Thank you for that link!