power cords fo monoblocks

If you are going to buy something without a demo first, ESP Essence and Richard Grey are probably the safest choices I can think of. With the exception of my Ayre gear, those 2 cables never sound worse than stock cords. That's very rare. Still, you should listen to them first.

I'm looking for cables that will add just a tad of warmth and also a benefit of a closer soundstage.

Have you tried moving speakers closer together or increase toe in for a closer soundstage?

I have 2 pairs of mono amps (SS & tube) and tried many high end power cables and finally settled for Harmonix Studio Master. They definitely add touch of warmth and smoothness and bettered my very expensive Kharma Grand Ref. in my system. I highly recommend the Combak-Harmonix Studio masters.

Hi all
Currently my amps using a pair of Aural Symphonics Cappucino PCs and I tried also Transparent reference XL.
My budget for a pair is around $1.5k. I've heard good things on the TWL 7+ (anyone ?).
The Transparent added depth in the soundstage but i'm missing a little bit of warmth.

You might try Shunyata's King Cobra CX or Anaconda Zitron...they should be close to your budget used.