I will try those out, thanks for the link!
I had figured that a good amount of the elements (power supply, headphone amp, RIAA preamp, etc) would be available as modules I can merge together into one box, making an interesting project.
This whole idea stemmed from a few DJ buddies talking about how the old Bozak CMA-10-2DL mixer from the 60's sounds better than any currently produced unit. I want to prove that with todays technology and components, you can make something that sounds at least as good.