I don't know either there are 25CM fan in the market...

But for 14CM, yes, they do, look for evercool or aerocool products...

IINM, icute does produce 25CM fan, but dunno either they sell it separately without their casing or not...

Yeah, quiet, but got a lot of CFM...

But one thing for sure, there's going to be a lot of dust in you're pc...

Slightly higher by a lot, or just little differences with those normal 12CM fans?

What about the AMPS, will it go sky high?

Chlorofoam?
The one that's used for making people unconcious?

Anyway, if i'm not mistaken, you could buy it from any hardware shops...

I wouldn't trust those shops to cut a sidepanel for my casing if i were you, better use ianho's service, tell you one thing, if those shops worker cut u're sidepanel badly, do you think you can claim for the damage?

Send to ianho la, trust me, you won't regret doing that, furthermore, his jobs are really nice, just look at all the casings that he mod already liao...