@candlejack that's hakuzen's ref number (he numbered them so that we all can uniquely identify what we are speaking about), it's mainly arbitrary (well, they were probably related to chronological order of acquisition, at least at the beginning - anyway, I'm pretty sure they're meaningless from an audio point of view , they're for reference).
I'd suggest you have a look at the cables with the lowest resistance numbers in the materials and price range you're looking for, and go from there. Me, I've both his #125 and #053, in copper, and they're both very good (with #125 being better, to my ears, but it's also quite a bit thicker, as you can see from the pics) - you can see some pics of both of them here: https://www.head-fi.org/threads/int...ressions-thread.887229/page-150#post-14809407
I'd suggest you have a look at the cables with the lowest resistance numbers in the materials and price range you're looking for, and go from there. Me, I've both his #125 and #053, in copper, and they're both very good (with #125 being better, to my ears, but it's also quite a bit thicker, as you can see from the pics) - you can see some pics of both of them here: https://www.head-fi.org/threads/int...ressions-thread.887229/page-150#post-14809407