IMHO the only negative of the X2 is the Y travel, if you can live with that, then it's a great machine. I believe that even with the tilting column the X2 is more rigid than the X1, but have no data to back that up.
Most of the people on these boards tend to be perfectionists. For the short time I've had my X2 it's performed much MUCH better than what I was expecting from reading about it online. (To be fair I did upgrade to belt drive right off the bat.)