Case fans 140mm vs 120mm

Anonymouselite5

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I've seen a few threads saying why a 140mm fan is better, but none of them compared them 1 on 1 and on a price tag level.

I'm looking for 2 120mm case fans for the top of my case.

The front of my case can take 1 140mm fan or a 120mm fan. I know 140mm would be better but I can't find a suitable one that is in stock at http://www.msy.com.au/ (south hurstville branch)

Also I don't want to spend over 35 dollars on 3 case fans.
If anyone knows any other stores in Australia around msy that I can just turn up to and just buy then please tell me.

Question: Which case fans should I buy and should I buy 3 120mm fans to keep to my budget?
 
Solution

Anonymouselite5

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Those 2 fans are a bit expensive if I were to buy 1 140mm fan as well.
 
Solution

Anonymouselite5

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Ty, might go with the BitFenix Spectre 140MM instead
http://www.mwave.com.au/product/bitfenix-spectre-140mm-black-nonled-pwm-fan-ab53108

Also I want 2 led fans for the top of the case so Ill try the cheaper cooler master ones.

Also what about this?
http://www.mwave.com.au/product/bitfenix-spectre-140mm-black-tinted-blue-led-fan-aa16087#detailTabs=tabOverview