The XLO 2.1 is an excellent IC. It improves a lot compared to the 1.1. I would suggest you to use it together with a couple of other Signature cables (e.g. 4.1B, 5.1) within the audio chain to bring out the best of XLO.
I used all these together with the Illuminati Orchid and I don't borther to try other cables since then. I won't make another move until they come out with the MK2 version. The Limited series is just way too expansive.