Thanks for your response. No I have not registered but am aware of the offerings, esp. the lots you refer to.
However, Santorini and Hawthorne are by the same builder (Brookfield Homes). Not sure how you plan on playing one community Vs. the other, both by the same builder.
Probably, I should have rephrased the question as, "At this point in time, how much the builder would be willing to negotiate on the list price and how much upgrade do you think they would be willing to throw in".
For me the most important criteria of selection of a realtor is "negotiability", other things remaining constant.
Depending on yours/others' response, I might be willing to hire one.