The XI line of bows were ahead of their time and had some of the fastest bows out during their time...some were hard to work with if needed new strings but worth it in the end...
They took a lot of game then and still can, if updated it will put meat in the freezer...
If your happy with the bow that's the one you will be confident with and likely shoot well..
I would take it in to a knowledgeable bow technician and have it looked over...If you are going to put it to use I would advise changing strings and cables...
Neil