Cullen or Triode Wire Labs power cord?

Cables are so unique to every person and system you really need to take advantage of their respective trial periods to make the right decision.  Honestly, you’d be foolish to decide any other way IMHO.  To confuse the situation further, PCs from Audio Envy, Raven Audio, and Core Power Technologies (Underwood HiFi) would also be on my radar.  I’d read reviews on them all and demo the two or three that seem to offer the sound/performance characteristics you’re most looking for.  Just my $0.02, and best of luck. 

I use the cheapest Triode model and they work fine.  The 12 plus & Ten plus.  They are 10 years old & have never moved since plugged in.
I like and build. 
Editorial:  I would rather fly to Hawaii for the $1399 he is asking for the Obsession model. But maybe it would be worth it to you.

You picked two power cords that are way far in price 😂

As the others have said, Triode Wire Labs have other power cords in the line up that are cheaper. You cannot possibly go wrong with either one of them.

Another suggestion is Shunyata Venom NR v10 or v12

I used both brands and both cables you mentioned in my system before. As thyname said, TWL Obsession and Cullen Crossover II are not in the same price range so it’s not really an apple to apple comparison. I personally prefer TWL power cords and I’d suggest you to give their 7 Plus or Digital American HP a try. These 2 power cords sound good to my ears and they’re in the $400 price range (used). 

Don't forget about LessLoss C-Marc. I may be picking up 1 or 2 of those cables today. Would love to see a Presidents Day sale.