Why do people choose the way they do? Unless you have a clear cut answer from Scripture which explicitly excludes the Reformed view, you do not have a "most unamgiguous verse."
When construing the written word, especially when the words and the language is carefully considered, as in the Bible, statutes, and constitutions, one of the basic rules of construction is that one must not read words into or out of the 'writing' when the words and language are unambiguous.
Another way to put it is that the words mean what they say.
The burden is not on me when the words are unambiguous; the burden is on you, because you propose a construction and interpretation that simply cannot be read into this verse by a reasonable man.
Marlowe is an attorney, and I am quite confident he would agree with me on this point.