Tom,
I've had my Adagios for almost 2 years and have used the Oval 9s for most of that time with very pleasing results. The bass is very well presented while being quite tight. They are excellent cables in their price range.
However, over the past year I converted all of my IC's to single crystal copper cables. I definitely liked the improved resolution they imparted while extending both ends of the frequency spectrum. Imaging, soundstage and particularly the smoothness of the sound (organic quality?) was geatly enhanced over my various copper and copper/silver IC's.
Those improvements led me to try the OCC copper AZ Santori. They provided the same type of sound improvement the IC changes did, only to a much greater extent. I guess the speaker cables have a greater impact on the sound then the IC's, at least in my limited experience. I don't see myself returning to non-single crystal copper. But I have also purchased the relatively inexpensive Belkin 14 gauge OCC copper speaker cables just to see how they would stack-up. I am amazed at how good they too sound! They are almost as good as the Santori(maybe not quite as powerful in the bass due to their lighter gauge). They exhibit the same great sound characteristics that I belive is inherent with single crystal copper. My suggestion would be to go with the OCC cables. But the prudent thing to do would be to compare the two and make up your own mind. You can get an 8' Belkin pair delivered for less about $55 via Amazon - maybe less elswhere.
Regards,
John