Who or Whom? which would be correct?

[N-OS X-tasy!]

samintx wrote:
[quote=cbelt3]
Whom or that I


Spell checkers are not the equivalent of a fourth grade ruler wielding grammarian / dominatrix .

I like "that I". thanks for the advice. Whom sounded right to me but THAT I sounds better!
Who/whom is considered to be the correct usage due to the fact the phrase references people and not things.