I would say that once you get to your goal of 126, just continue exercising and eating healthy and see what happens. Maybe 126 is a good natural weight for you to have, or maybe you will drop a few more pounds. If you have to deprive yourself a LOT to reach 115, then it's probably not natural for you to weigh that much, and you'd have lots of trouble maintaining. Actually I think at 5'7" and 115, you would be under
weight, which is dangerous for obvious reasons. So yes, I'd recommend that you just work on maintaining 126, and if you happen to lose a little more then great, but if not that is a very good weight for you! Hope I'm making sense, heh.