Phib7777, if it true that the XV-1s had a phyisical issue mounting on the 10.5 that is unfortunate. But as has already ben said I don't think you could go wrong either way.
I have not heard the Phantom.
But, I have the Raven AC and the 10.5 along with a Triplanar VII. The 10.5 is my arm of choice but as you know the cartdrge used can have a huge impact on what arm one likes.
The current setup is much better than the Aries 2 with 10.5 arm that I started out with. It also cost a lot more. But then at one point I added the SDS and the super platter that was available a couple years ago so it was not inexpensive.
The difference from my VPI rig and what I have now is significant. The speed controller and motor and table are just better. But both arms alow for a very fine degree of setup with the ZYX Universe cartdrige with is the big key for the best performance. Some carts are less fussy from what I have read but I would have hard time considering an arm with out easily repeatable fine settings.
I have a lot of fun with vinyl but it takes some effort. You have a very nice system and I think you will easily enjoy what ever upgrade you end up with. Good luck.
TD