Can I buy my system like this?

The question is what is your budget and what is it going to be used for? If it's gaming there's no need for X79 - too much investment for virtually no payoff in terms of performance gained. Plus you have way too much money invested in case fans and too many Corsair products, not everything they make is great.
 
I'm not asking wether the system is overkill/out of my price range.
I wanted to know if any of the components don't work well together or have bad reputations in general.

Sorry for that confusion.
 


Will it actually work? Yeah, but why?
 


Again it's a question of what your system is going to be used for before I would say it's good or not. If it's gaming I would suggest something completely different.
 


Why do you think that? From what I've seen/read the 3 120 mm fans in the front won't even be close to the MoBo or the GPU.
And about the 2 140 mm's and the rad at the top, there should still be a 1 - 2 cm space inbetween them and the MoBo.

I really don't think space management should be a problem with this case since the PSU and the 2 5.25in bays are in the back.
 


If you can clean up the cables nicely and make some room in the case for the fans to actually do something It should work just fine then.