Pass amps + Power Cords ??

Good call. I can respect that.

I've had very good sound with Cardas, Platinum power, and various BMI power cords on my Pass X150.5, Aleph 2s, Aleph 60s, Aleph 30, and Aleph 3.
I disagree on the X350.5. If this amp has no negative feedback like the original X350, I prefer the X150.5 or X250.5. They just sound better with some negative feedback. The bass is stronger, in my opinion.
I know there are purists who disagree with me based on a philosophy. I go by what I hear.

anything to avoid

yes, you avoid the clowns who try to tell you that cabling has no effect on sonic signature. Obviously never tried it.

I can respect that, too, Bob. Thank you. Many years ago...I upgraded speaker/interconects at the neglect of power cables. My advice to any newbie in this hobby would be to START with the power cables...they really CAN make an impact.

Consider Elrod, Silent Source, Stealth, and Synergistic Research.

Check with the Cable Co for recs and some trial cables.

Good luck, have fun.