Transparent Balanced Interconnects and their generations

Could someone give me details of the various Transparent Cables over the years and the year they were introduced.

XL, MM, MM2, Generation 5

Which models to stay away from and which ones to buy if buying used older models.
Stay away from these unless your system sounds terribly bright and you want to warm things up. Speaker cables with boxes on them I do not recommend anyway.

My System is anything but bright in fact warm.
The Speakers I currently have are Wilson Audio Sasha and use the Transparent XL speaker cables which was recommended by Wilson Audio.
It definitely improved the bass and made my system sound musical.