Thanks so much for these replies buddy you've confirmed a lot of what i thought.. (which is helpful!) Just to conclude..
4 may have to have one custom built --> i'm hoping there's something on the market "SOMEWHERE" i'll post if i find anything!
5 i am asking one of my buddies --> If you can link me to something i'd be eternally in your debt... it would be incredibly helpful!
6 you can daisy chain them, there may be a small effect on voltage which would grow with the cheaper fan controllers but the aquaero 6 can handle 20 fans per channel i do not know what the aq5 can do... --> My biggest fear is having to run NON-PWM fans at LOW RPM for LONG periods of time which I'm assuming would create a lot of excessive heat... so i might need to sell up i suppose and move to the Aquaero 6 to keep them PWM can someone confirm whether PWM fans will produce significantly LESS heat than 3 pin fans at LOW RPM for long periods of time?
7 you are right pwm would however with the aq6 it becomes a non issue with the aq5 you would only have the one channel -> Yeah, 1 channels not cut it, gonna have to move to the AQ6 if running 10-12 fans on NON PWM 3 pins is going to create too much heat at LOW RPM.
new question
i would worry more about static pressure then CFM and static pressure is not a given figure there is a chart that 99% of manufactures never take the time to do.
any good watercooling fan would work and if it is good for a rad then any size would work ( noctura, gentle typhoons, to name a few.) if you are looking for silence then more fans are key although i would say i would stick to 120mm or 140mm but the 200mm are more quiet but they tend to have poor static pressure --> This is what i was thinking... Do you have any good suggestions for strong static pressure fans? I'll post a few links to fans i was entertaining and see what you think? like you said it's a hard thing to know unless they post this figure!
Phanteks PH-F140HP 140mm
140mm / + LEDS! / PWM / WHITE / 88.6cfm / 1550rpm /19db / £10.97
http://www.scan.co.uk/products/140mm-pha…mier-cooler-fan
14cm white LED fan with PWM speed control from Enermax - UCCL14
140mm / PWM / WHITE / SNAP OFF BLADES / 39.48cfm - 86.07cfm / 1400rpm / 9 - 17db
http://www.scan.co.uk/products/140mm-ene…achable-batwing
be quiet! Shadow Wings 140mm PWM BL027 Quiet Case/CPU Fan PWM
140mm / PWM / BLACK / 200,000hrs / 60.4CFM / 18.4db / 1000rpm £12.94
http://www.scan.co.uk/products/140mm-be-…se-100-184-db(a)
BONUS QUESTION!!!!
If all my gear (PS3/XBOX/Amp/Server/PC etc was lying on the bottom of the cabinet... Where would you think the MOST EFFECIENT place to mount the fans in the back of the cupboard would be? Top? Middle? or bottom where the device are blowing out hot air? I know hot air rises but I'm unsure as to whether it would be better to mount all fans low and catch and expel the air as it left the devices OR to mount the fans high as hot air rises to push the air out? Anyone got any opinions on it?