I've lost and regained, too. Not large amounts but I understand what it's like to regain and end up right back where I started. It happens to the best of us. The good thing is that you're back!
I think your goal of getting into the low 200s is a good one. When I started here in April I was overwhelmed by how much weight I had to lose. I figured even getting to 198, just under 200, would make me happy. I'm still set on that goal. I'll reevaluate once I get there, but for now I can't set the bar too low.
Good luck getting back into the swing of things.