Just one train of advice as pertains to the question, make sure you've evolved your wires, the higher the resolution on the cables the more you will hear differences in power cords. There are a lot of enthusiasts that simply can't hear power cord differences because they have cable weak links that bottleneck the detail that power cords work in. The other thing is a power cord on the amp is the bigger bang for the buck, the preamp does make a difference, just not as big a one, the better your cables the more difference you are going to hear there.
I haven't tried the Tara so I can't comment there.
I used to work people from my suggested entry grade which was usually an improvement, to the mid grades for a few hundred more dollars, they would say what about power cords and I'd tell them not until they were into the upper echelon that would make more performance difference than power cords at that point would. Then I would say they were ready for power cords.
That perspective is the result of hundreds of thousands of dollars in complete cable and equipment lines from the manufacturers, and trying every combination of upgrading possible.
I haven't tried the Tara so I can't comment there.
I used to work people from my suggested entry grade which was usually an improvement, to the mid grades for a few hundred more dollars, they would say what about power cords and I'd tell them not until they were into the upper echelon that would make more performance difference than power cords at that point would. Then I would say they were ready for power cords.
That perspective is the result of hundreds of thousands of dollars in complete cable and equipment lines from the manufacturers, and trying every combination of upgrading possible.