Your advice is very much appreciated: 1. Starflex SPX Speaker Cable, 11 Guage (4-14AWG conductors)Conductor DC Resistance: 2.6 ohms/1000 ft, Nominal Capacitance: 45 pF/ft (StarFlex SPX - 11 Gauge Speaker Cable - 4-14AWG Conductors | River Cable) OR 2. Zebra Cables, ZC SP10SD, 2 x 10 AWG...

Parts upgrade: Premium parts upgrade package. $400 We carefully selected the best possible audiophile graded parts that bring the ultimate performance from the amplifier. Parts upgrade are intended for amplifier purchase, not to be sold on a standalone basis.Blackgate output coupling...

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I'm new to tubes, but hate to buy stuff I'm just going to replace later--major pet peeve (money after money). This unit is for my office to run two mid-sized speakers. Sound clarity and base is paramount. I would greatly appreciate some experts like yourself providing insight and opinion...