And if you're retired military, Tricare Standard is awesome insurance. A pittance a month for premiums, 20% co-pay after a small deductible, your choice of doctors, etc. No Delta plans come close.
I do have Delta's TriCare Supplement insurance. ItS not real cheap, but I never pay a cent other than premiums.
TriCare is a no brainier...just choose Prime if close to a base and can stomach the managed care. Otherwise choose Standard and be happy.