[mishman]

I provide this only to be useful to others who are retired, no longer on a group dental plan and subjected to the whims of the individual market for dental insurance. MetLife, while getting high marks, does not sell to individuals for dental, only groups. Spirit Dental, which I ended up subscribing to for individual coverage for my wife and me, does not maintain a network but does everything by zip code - in Moultonborough we are in zone five. This dictates reimbursement amounts.
The net difference for me and my wife was the following: Delta Dental $126 (up from $94 in 2015) with lower reimbursements for preventative care and other charges (therefor more out of pocket).
Spirit Dental $108/month for the two of us, but all preventative (inc and extra cleaning a year - 3 vs 2 for Delta) covered plus no out of pockets for preventative. It was a no brainer for us to switch and our dentist's insurance person confirmed this.

Now if you get Delta on a group plan, the numbers will be different but Delta is going up as they move from a non profit to a profit company so beware!