Update 9/28/15
Many parts have arrived and testing was done on the MOSFET based voltage regulator. The system is able to create a voltage with very low noise based on a ratio to an input from what will later be a DAC. The amplifier I have obtained is good, but the depedence on the chopper integrator circuit makes it difficult to practically implement, so I will find alternatives.
Below is the basic design of the feedback based voltage regulation circuit I came up with. The system has ~6 times gain of the input voltage from the DAC (goes into the non inverting input) to what comes out. This system will rely on having a pull down resistor across the positive and negative rails to get down to low voltage and little output current.