Well, the system is already up and running. I'm just looking to expand and want a bigger case for it.
The current components are:
SeaSonic X650 Gold (has a 'smart' fan which only turns on when there's high power use, therefore it is never on in here, and barely makes heat)
AMD Sempron 140 Sargas with 1GB DDR2 on an Asus M2A74-AM.
Using a COOLER MASTER Hyper 212 Plus to cool the CPU, no fan installed, hot air exits through the top of the 300 where the 20cm fan hole is. It runs at around 40-50 celcius, but thats only using a Infrared Thermometer, as I coulnd't get a temp readout in unRAID or unmenu.
Currently housing 6x2TB drives, which run at 30-40 celcius when in use.
So other than drive spinup, and running, which I have set to spindown in 15 mins, no noise. When they are spun down, and the case is open with your ear in the heart of it, it does not make a noise. I love it. I had to plugin the power light pins on the motherboard to be sure when its on and off now. Heh