Quiet, but effective 120mm cooler

[eLux]

Hi! I am going to replace my Antec 120mm cooler, which came with slk1650b case. I think it makes ~30dB noise. Well cooling efficiency is great, but the noise price is too high for me .
In local market now there are only GlacialTech, Coolermaster, Spire and Titan :-/ 120mm coolers.

Most reasonable I think are CM Ultra Silent Fan Series (SAF-S12-E1) (13dBA, 720 R.P.M., 11.27 CFM);
GT 12252BDL (950 R.P.M., 19dBA, 37CFM);
CM UV Silent Fan (SUF-S12) (1220 R.P.M.42.73 CFM, 22 dBA)

Will first coolermaster be effective enough and worth its double price?
P.S. Without fan my case gets extremely hot ~48 C idle

 

[Extraordinary Cow]

Wait wait wait....your CASE gets that hot?! Your CPU maybe, but the CASE?! Where are you reading this from?!

 

[eLux]

EPoX 8RDAI Northbridge... HDD Samsung 160 GB ATA gets same temperatures without fan. Now Barton@ is 44, system 35, HDD 35 degrees too. But too noisy...

 

[IEC]

Maybe you're the perfect candidate for a fan controller? The Zalman MFC-1 series is good - they allow 4 fully controlled channels and 2 switched channels for anywhere from 0 to 10 fans.

 

[eLux]

But there is no possibility to control 12V fans. Am I right? (connected on molex)