Just an FYI...I finally got a response to my 2nd inquiry about specific rates:
I have contacted the Equinox account services department and they informed me that when you sign up you would pay an initial fee of approximately $145.00 and pay a monthly rate of $170.00 to $310.00. Please note that rates are subject to change due to various promotions that individual Equinox gyms have running throughout the year.
Given that I'm not looking to join until about September, I'll hold off for now and perhaps hope for a promo by then