Awesome race.  I'm really happy for you!  I know exactly the kind of training you were putting in, and you definitely deserved the result.  It's shocking how similar your race was to the one I ran in April, with a large negative split and an early decision to pick up the pace.  The fact that you made your surges decisively can't be underestimated.  I really think, within reason, as long as you make pace changes confidently, you're likely to sustain them.

Congrats on the race, and I hope you're still enjoying that feeling of accomplishment.