Power Cord: Need to choose from these, please help


Friends,
I am on a quest to buy a nice power cord for my source.
To start with I do not believe in Shielding theories as I have heard quite a few unshielded power cords being more silent and clean than shielded ones. Moreover I have also found a lot of shielded power cords sucking the life out of music making it slow and boring.
So, I have a budget of around $500, give or take 20%. I am equally at ease buying used and new cords. I am not looking for a power cord to equalize sound, so it has to be neutral and true. After some research, the power cords I have shortlisted are:

1. Cardas Golden Reference
2. ESP Essence Reference (used)
3. Omega Mikro Planar Active (used)
4. Purist Audio Dominus (used, this can still overshoot my budget)
5. Telwire (used)

I have heard none of them :(
But I have only heard the ESP cord among these and liked them quite a lot. But they are rare in the used market. Cardas is the most commonly available cord among these and I am surprised to see them getting sold within couple of days of getting listed, are they that special ?
Omega Mikro looks like another brand which is highly spoken about in circles and the used market price does fall in my budget well.
Purist is in this list simply because it has got such rave comments in this forum that I really could not stop considering them and I am waiting for what you guy have to say about Dominus in the company of other good cables (some of them over achievers).

Kindly suggest and if possible give me a comparative signature sound of these so that I know what to expect from each. I understand that at the end system synergy is the key but I feel my system is fairly neutral and a brief idea of the sonic signature of these cables can help me decide one among them a lot more easily. Also do feel free to add your recommendations to this list.
pani
Dude, you're wearing us out with this. No one can (should) tell you which one to choose. Just pick two off your list, I suggest the two cheapest and live with them for 2 or 3 months and then pick one and sell the other. Repeat this process until you fall in love.

Have fun in the process.
Here's a secret: most people on these forums are clueless when it comes to cables.
Try the cable company, they have a lending library and may have one or more of your cords. Including many many others. They also have knowledgeable people to help find the right cord for your set up, going by your parameters.
Good luck.
On a tip from a fellow Agon member, I bought the Absolute Audio power cord II from GTT Audio out of New York. They carry outrageously priced stuff and set out to design a great sounding power cord that works in all systems. I was skeptical but one cord taking the power amp cord and another in place of the cd player changed my mind. I had bought an Edge m-6 amp from an Agoner who told me to replace the cord with the AA II and it would sound much better. It was like I cleaned dirty windows to what it did to the sound. $49.95 per cord--it's your money.
In all probability the pc that came with your amp is most likely more than enough to deliver what it was intended to do, power your amp.
Sorry about the "wearing us out" comment. I thought you were the same person who just put up 3 or 4 power cord questions the last couple of days.