What Constitutes The Upper Class?

So we've all been hearing a lot about the Obama tax plan, the "break" for "95%" of Americans.  We all know that the upper class is going to see a tax increase under this plan, but what constitutes the upper class?

--When he initially released the tax plan, Senator Obama said that everyone making less than $250,000 a year would receive a tax credit.  Upper class was considered to be everyone making $250,000 or more.

--During his infomercial last night, the number was stated as $200,000 a year.  The bar for "upper class" dropped a solid $50k a year.

--Earlier this week, Joe Biden said "tax cuts for everyone making less than $150,000 a year".  Lower than either of the Obama numbers.  (Note, some pundits call this a slip-up, I don't have the authority to make that decision, but Biden hasn't called it a mistake yet).

So what do we believe?  That's a $100,000 window where we may or may not be getting a tax break.  To the undecided voter, this is a little unsettling.  Say, for example, an Undecided voter is making $175,000 a year.  Under Biden's number, this guy's gonna see his taxes go up, but he would get a tax break under either of the Obama numbers.

We need this number set straight now.  We need to be informed to vote, not confused.