Greetings,
I'm looking for some advice on a new case for my rig.  She's currently in a FD Define R5.  I've been very happy with the case but can't find a suitable cooling layout.  The attached pic shows the former layout; unfortunately it causes negative pressure which then pulls in dust, etc.
 
AIOs
CPU: 4790k w/ CM Nepton 140xl
GPUs: 2x 980 Ti Hybrid (ref cards with Hybrid coolers and back plates added later)
 
Here's what I'm trying to find:

• Supports all three rads and their accompanying fans
• Enough fan mounts to cause positive pressure with the AIO rads/fans running
• Has enough hidden drive mounts to support one 2.5" (SSD) and two 3.5" (HD) drives; more is better
• High end build quality but not out of my price range ($120ish)
• Windowed 

I've been looking at FD's Define S but am unsure if I'll be able to get positive pressure in it.  Has anyone used a Define S in a similar set up?
 
Thank you in advance for your time; I look forward to your replies.
 
Regards,
Falconeer
 

Dschijn
quick fix... make the AIO fans all as intake from outside!

Unfortunately I've been unable to find a way to do so.  Currently I have the two Hybrid rads in the front in pull config with two 140mm fans (FD GP-14) pushing from the front and the Nepton exhausting out the rear.  As a result when the GPUs spool up they're dumping their heat into the case which elevates CPU temps.  The R5 has filters on the bottom and front only.