I was a Baptist for 20 years, 30 of those years under the doctrines of grace. There is an exellent book written by a former Baptist Preacher who set out to prove the fallacy of infant Baptism yet in the process grasped the message of the covenant. It is called "The Children of the Promise", by Robert Booth. I enjoyed reading it seeing that it was from a Baptist with no mission to "prove" his side.