Today I got the preamp project to work. I used the input and output stages located at diyrecordingequipment.com with the THAT1200 for input and the DRV134 for the balanced output. The power supply was adapted from eleccircuit.com. Initially I was only able to get fuzz noise, but that was caused by a grounding issue that I was able to track down. The noise floor is still relatively high for a preamp, but I will be troubleshooting that as/after I design a case for my preamp. Below is a picture of the bottom of my design as I was testing.