You use a "Cooler Master HAF X"?
The front 230mm intake has massive restriction due to the HDD cage. Filters and grilles add restriction to intake flow too.
Also there's no 230mm Noctuas ,even if 200mm ones are in the works.
Front:230x30 mm red LED fan x 1
Top:200x30mm fan x 2 (one is optional)
Side:200x30mm fan x 1
Rear:140x25mm fan x 1
VGA card fan duct:120x25 mm or 120x38mm fan x 1 (optional)
VGA card holder:80x15mm fan x 1 (optional)
The odd thing is the HAF XM actually has better fan swap options:
Warning: Spoiler! (Click to show)
120mm x 2 on front intake (instead of 200mm stock fan)
140mm x2 side (instead of 200mm stock fan)
200mm x 2 top
As far as 200mm fans go, most people I've seen recommend the Coolermaster Megaflow. I haven't seen any 200mm fan roundups though.
The recent NZXT FZ-200 got a review but no comparisons were made:
For 140mm and 120mm, the Arctic F14 and F12 are options you can go for. The quality control is less though.
There's also Gelid Silent series 140mm and 120mm.Edited by AlphaC - 9/29/13 at 6:12pm