Help selecting a power cord.


All my gear has the factory supplied power cords  I’m ready to try 1 aftermarket power cable as a test.  So what brand power cable should it be and what device gets it first?  Tube pre?  Tube main?  D/A?  CD transport?  Roon Nucleus?  Subs?  GE Trefs?? Turntable? Oppo 103?   Which piece of my gear should be most affected by the improved power cord??  I look forward to the responses and will likely choose the cord that has the most recommendations.
128x128fastninja12
@budburma 

+1 on effects of power cords. I have optimized my final system multiple times through 1. Speaker cables, 2. Interconnects, and finally 3. power cords.  Each time the final system was very significantly better at the end… by at least a component swap level because of it. But in different systems… the same cords and interconnects would not have been optimal.
Virtual Dynamics literally changed my system for the better…I had a veil of congestion that’s been completely wiped away by Virtual Dynamics pc’s. I added a Power 3 on my Subwoofer, a Power 3 from the wall into my PS Audio ultimate outlet HC (main amp) and a Virtual Dynamics David series from the wall into my PS Audio UPC 200 (Preamp, DAC and streamer). I couldn’t be happier with the results…clarity & dynamics really improved. Friend of mine who’s familiar with my system was over and I didn’t say a word about the changes. He immediately noticed…”ok, what did you do here? It sounds great!”. Validated. I’m a believer.
jl1ny, I agree with your take on Virtual Dynamics.  Because of budget restraints, I'm a used market purchaser for the most part. I picked up a used VD Testament r a few months ago. I tried this on various components. The biggest difference was with my preamp. It was definitely a WOW moment. I just recently picked up a Testament 2 for my amp. Another WOW moment. I also have a Power 3 that I will be using in my secondary system as soon as I get the ambition to rewire. 

 I'm sure there are better cables,however I just don't have the time or funds to try them all!  In the meantime,I'm certainly happy with my modest investment vs rewards. 
@rocray It took me a while to find the VD’s but it paid off. I ended up with 4 total…Im keeping 1 in the event that I upgrade my power amp (my ARC D400MKII has a hard wired pc) I’d love to try the VD on my preamp but there’s no way I can get the bend radius to fit behind my rig, as you know they are ridiculously ridged.