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Appreciate the Input, I guess I had the answer, just not certain. 
 
240 is going to work, but may be noisy, and a bit too warm.
 
Adding a 120 would solve the issue, buuuut I don't have the space, 
 
(Talking to myself:
Maybe an external 120 in the back then... )
 
I'm currently in the process of designing my own matx case since i don't like anyone's products. 
 
ATX PSU in the front top is the feature I want lol.
 
Thanks..

lol, i'm noctua all the way. already own, 2000rpm ippc 120mm and 2 regular nf-f12s. also have 3000rpm ippc 140mm, but thats like jet engine
When i do the build, I'mm see if i can OC, maybe it'll work, maybe not... 

yeah then just use a 240 and dont overclock and everything will be fine
dont cheap out on fans though

First off, nice job putting the diagram together. 
 
AFAIK, that diagram looks right, it should work that way. The sub will do a frequency crossover, and waive the mid-high frequencies (only play the low frequencies). Just play with the knobs on the sub to get the sound right. 
 
And nice to see Jamo is still used. My dad got a pair of Jamo standing speakers for almost 20 years, and they're still working. Good brand.

Yeah i think that's what you need to do. 
(you can also check out
for other ways to add a sub)