We have done Blue Cross Cadillac, Blue Cross regular (current) and GEHA. GEHA was cheaper, didn't notice any difference in terms of preferred provider choices BUT we had a big medical emergency during that time that involved a long hospital stay. GEHA randomly and inexplicably denied A LOT of lab charges, based on weird reasons like they don't pay for automatic lab tests. It added up a lot, like more than the substantial difference between GEHA and Blue Cross yearly total charges.
Currently have the cheaper Blue Cross. I wish I could convince my wife to get one of the high deductible health plans with HSAs but she won't do it