Originally Posted by Bluegrass 7

Lets put it this way, the OEM coils are the best your going to get for quality and average life.
Since they are used from the factory, any other coil is of unknown quality, so the OEMs are the standard.
Realize that the coils live under very harsh conditions of heating and cooling from the heads, heat from the radiator and heat from the exhaust manifolds just after engine shutdown.
Like any other part, they are expendable over time same as tires and shocks.
You will replace most tires sooner than coils with their higher cost and think nohing of it , discounting exceptions to that like anything else.
Good luck.