I'm in a keeper league where we can keep 3 overall players - 1 who you drafted in rounds 1-3, and 2 from rounds 4 onward... you lose the draft pick where the player you keep was picked the previous year.

I am definitely keeping Clinton Portis (losing my #1) and Chad Johnson (losing my #4)-

my question is this -

do i keep Andre Johnson (and lose my 9th rounder) or keep Brian Westbrook (and lose my 18th rounder-and last pick)?