I agree with what Tflexxin said. That said, you can still gain about 5 more pounds, evenly (your proportions are very good) Then come in harder and dryer, you would still be a middle weight and do every well in those shows.
The lightheavys, is tougher, because most of them are heavyweights comming down to lt. heavy. You have very good symetry, and muscle mass. eventually you would look fantastic as a lt. heavyweight, but I wouldn't jump into that weight class right away.
You have at least a year to work your way up to that class. Even if you can do it now, it would be harder to make it a more quality, mature phsyique like you can as a middleweight.
As a 5'-5" middleweight you have very good size, the quality will come with a little more time and conditioning. Can't wait to see your next pics! Congrats and keep it up.