I have to agree with Rlapporte. The Ref w/xl is better in all area's than the ultra. However, Transparent says the most important cable is the source to preamp, then speaker, then pre and amp. I might upgrade the super to ultra or ref 1st. Also, ac cords make a big deal. I like transparents ac cords. I bet they will help on your VTL equip. But, here again, put the best on your source 1st, then amp or pre.
Good luck
Good luck