I've been gone for quite a while as I'm in college right now but it's great to be back.
I already made a 12V regulated PSU w/ current booster and a 19W bridge type amplifier w/ an LA4440 chip. I will now be a pre-amp circuit using 2 BC109C transistors. My instructor told us to...
Noctua's SSO bearing should take care of the orientation problem.
One thing I like about noctua, despite their color scheme which i do not really hate, is their dedication to R&D giving us supreme quality products.
The cooler is mounted horizontally? Im sure you know that sleeve bearing and similar types wear out quickly in that position. Ball bearing fans would last longer but they are noisy though. How about a Noctua NF-F12 PWM? The gentle typhoon is a really popular choice too.