Squeaky, you will outgrow the XR. By outgrowing bikes, we don't always mean they become too small, we mean they don't have enough power, the wrong sort of power & other variants. It can mean as your skill level increases you no longer have to flat-foot the bike & are keen to try something bigger.
At a guess, you're not too far away from outgrowing the XR :) Can you afford to buy another bike & keep the XR as a spare?
Pyro, how are you going with your bike? Still in love?