Well there comes a time when people have to change stuff and get modern....
 
At the moment I started an upgrade transition with replacing my CPU chassis for a more up-to-date thing. Next will be my graphics card which I opted for a Fanless GPU solution which will still do what I need to do.
 
I placed a * beside each item I already have.
 
Eventually my goal is to have a setup like this.
 
Antec P100 White Chassis *
Intel Core i7 7th Generation
Nofan IcePipe Fanless CPU Cooler
16/32GB DDR4 SDRAM
256GB SSD drive (for os and programs)
256GB SSD drive (for current sample libraries)*
1024GB SSD drive (for larger sample libraries)
Universal Audio external device (Thunderbolt)
Palit GTX 1050Ti Maxwell GPU [Heatsink/No Fan] 4GB
 
I plan to use my current drives as backup storage or reuse one of them in an alternative system. My aim is silent as possible , fast and functional with very little bottlenecks as possible eventually. Leaving only one exhaust fan at 120mm and a PSU fan which gets turned on by the PSU itself when required.
 
It would be nice and the power savings would show over time.
 
 

If you pull the trigger, Let us know how the Fanless CPU Cooler goes.

I recently did a PC upgrade.  The main items are in my signature.
 

Airflow is a consideration so maybe 1 exhaust can using pwm sensors.

What disk are you going to record to?  I would recommend using a 7200 RPM standard HD (as opposed to an SSD).

That's a good question. Bear in mind there are different forms of SSD technology now. 
 
I suppose it will be a case of SSD boot, sample drives as SSD and a large capacity drive. Small sectors don't need to be fast writes anyway. Looking at the Seagate SSHD range which uses a Hybrid method of storing data. As long as the drive is quiet as possible as this is indeed the aim.