Speaker Cable Questions


Opinions please:

(a) For lengths of approximately 25 feet, is 10 gauge wire preferred over 12 gauge? I suppose 10 gauge is always preferable to 12, or is it?  

(b) Everyone on this forum knows how expensive "quality" cables are. While I haven't checked extensively, I have yet to see any of these quality cables available in 25 foot lengths. if they were I would have to mortgage the house  to buy into them. So the question here is what are the "best" (somewhat subjective I know) cables at 25 foot lengths? (cost no object answers as well as costs commensurate with an Musical Fidelity M6si amp welcome).
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I have used  Blue Jeans extensively before, they are not very good cables, actually, compared to Mogami, they are pretty bad.
ZU Libtec are very good regardless of  price and for what ZU sells them on Ebay greatest value in audio.
AQ type 8 is a good value as well.

I've heard Blue Jeans quite a bit and if that was I could have I wouldn't listen to music much . YMMV 
Mogami 3103 and supra ply 3.4 are very problematic cables. The Mogami sounds very dark, heavy, slow and atmospheric with rolled-off highs. When i put it in my system it sounded like i thrown blankets to the speakers. I really felt sick with this cable on. The Supra Ply 3.4 has many problems ,too. The first big problem is the lead voacals which sound laid back and very muddy. You will not hear a thing of what the lead singer sings with this cable. The second serious probelm with this cable is its stereo image. It is not balanced and it draws the vocals to the left side. It's like the plane is leamning towrds the left side. That is very annoying.
I used yo have some signal cable on my system but they added a harsh sound then i made a test with a dealer friend who loves xlo cables, the difference was huge! But my budget didnt allowed me to change all my cabling to xlo so i started to search occ and cryo cables on the web hoping those properties presented on the xlo were the key. After a lot of research and reading i bougth some audio sensibility impact and some xlo, for the money the audio sensibility are great, no harsh, better and stable image, bigger soundstage, a little bit less gran xlo but lot better than signal cable. The only SC remains in my system is the silver digital cable.