I think 1700 is a reasonable number, and if you want to eat that much, go for it.
But, I doubt the binge is what caused the breakthrough. I'm reading the new Atkins book now. It says your weight has to stall for 4 weeks before it's really a stall. If you hadn't been weighing yourself every day, you wouldn't have known you were "stalled" even!
Congrats on your big loss!
DISCLAIMER: I expect to lose this weight over the next 6 months to 5 years. I'm not going to feel like a failure if it takes an entire month to lose 1 pound. I'm going to feel like a success when that happens! I may offer advice that I'm currently not taking myself. Feel free to call me on that!