The thread has quickly matured, so I'm responding without having read all the posts. If I am covering ground others have already trod, my sincere apologies.
I take exception to the platitude, "Think like a Calvinist, preach like an Arminian." The great Calvinist preachers of old, both Baptist and Presbyterian, preached like Calvinists. There is a liberty of sorts when the preacher takes to the pulpit knowing that the saving of sinners is the responsibility of God alone. This liberty is not to be mistaken for an endorsement of weak gospel preaching. On the contrary; this sort of liberty allows the preacher to deliver the Gospel in power and without compromise. Without the preaching of the Gospel there is no other source the sinner can turn to for salvation.
Romans 10:14-15 14 How then will they call on Him in whom they have not believed? How will they believe in Him whom they have not heard? And how will they hear without a preacher? 15 How will they preach unless they are sent? Just as it is written, "HOW BEAUTIFUL ARE THE FEET OF THOSE WHO BRING GOOD NEWS OF GOOD THINGS!"
It is a fallacy to even entertain the notion that Calvinist preaching is short on appealing to the sinner to come to Christ. Calvinists do not possess perfect knowledge. God has not revealed to them who is elect. The sum total of the elect is a mystery, but be assured that God knows all of them by name. Since the Calvinist knows that God calls His elect through the preaching of the Gospel, it is a sad Calvinist preacher who would proclaim anything but the Gospel, and that with power and clarity.