I shoot a Ten Point GT Curve and the HLX. One could not ask for better performance with either. I have not shot any Excaliber products, but based on testimoney from many users they seem to be first rate also.
As with many products today, if you have an opportunity to try both brands you will be better able to decide what works best for you! A decision between either of these brands will be a winner I am sure!
For me, I am not gonna try to fix or improve on something that I am totally satisfied with--- and that is Ten Point!