You might want to consider Hypnotoads moving coil Op Amp design. It does the entire job and you will have line level outputs, not hi level phono outputs. Get the entire job done in step right at the source. Just a suggestion. It also gets good reviews on the thread.
To some people LOTS of stuff really matters. From an engineering point of view, any real component can be modeled by resistance to ground, series resistance, capacitance to ground, series capacitance, self inductance and induced inductance. (That's a stupid way to phrase it but I'm not getting a better way to say it right now). Some of those values will be either small enough or large enough (resistance to ground) to ignore. Others won't. It is the combination of all that, that affects what the wire does to the signal while in service.
Again, LOTS of people will tell you that burn in is real. Again, from an engineering point of view, there is nothing that will change in the wire or the insulation do the passage of audio level signals.
Some day I'm going to try setting up a test rig that is set up as an instrumentation amp. Feed the same signal into 2 identical interconnects and then into the separate inputs of the amp. Since the amp works by amplifying the difference between the 2 signals, the output would be real proof of the interconnect making a difference or not.
By all means, protect those ears. They are the only ones you have.
Shelly_D