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
From your list I have had the Tel Wire and Purist Audio Dominus in my system. Today I only use Tel Wire power cords. The PAD cord I had used the Ferox shielding. It is a very nice cable but quite hefty and hard to maneuver. I found this cable sounded best on an amp, not my source components.

I was not able to do a side by side comparison of these cords, but from recollection the sound was darker using the Dominus in my system. The Tel Wire is a very neutral cable. The lack of shielding (at least in the traditional sense) had no adverse effect in my system. It is also a very flexible cord. Unfortunately the Dominus will show up used more often than a Tel Wire cord.
this can be a lot of fun.
04-17-10: Bob_bundus
There can also be a lot of frustration in what I sometimes call the "power cord jungle." They make a difference, but finding the ones that make a "positive" difference is not always a walk in the park. Takes patience.
Bob Bundus,
Just an FYI: Virtual Dynamics is no longer! Of course, still available used.
I finally got the ESP Essence and ESP Essence Reference. Both are great cords with difference strengths. Essence is warmer and fuller, Essence Reference is a little more open, tighter bass and more transparent. Both of them do one thing very well, that is PRAT. If you are looking to add a little more PRAT to your system without changing tonality, check out these cords.