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ystech fan make lots of noise for the performance they offer. You could go wit a thermaltake 60mm 31cfm @ 28dba. Less noise more cfm. 
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The specs on ThermalTake fans are HEAVILY exaggerated. I wouldn't really trust TT with something as important as a CPU fan...
My recommendation, if you have the money, is to upgrade to an Alpha PAL8045 and get a quiet Panaflo or PCP&P Silencer. You'll probably get even better cooling performance with much less noise.
If you plan on sticking with your current heatsink, then you should
definitely put some AS2 on there. It's amazing how much AS2 can lower temps
As for changing fans, there are a ton of 60mm fans out there. Take a look through them at
Plycon and
2CoolTek and find the one that best suits your needs. Again, I'd recommend avoiding the ThermalTake fans, but if you think one of those would work, go for it. Good luck, getting a quiet system is a pain, but worth it.