How much $EV will you give up?

[Moonsugar]

An argument with adanthar in another thread got me thinking. Instead of hijacking that thread even more than I already have I will start this new one.

Here is the situation:

Typical Party SnG payout, 6 people left, you are UTG with 1000 other stack sizes are: 1400 , 600, 1000, 1800, 2200 (bb). Blinds are 100/200. Blinds will increase to 150/300 in 9 hands. Opponents are about as good as you.

If pushing is -$EV (according to ICM) it could still be a worthwhile move so that you preserve your FE.

Questions: How much -$EV will you accept in a push here to preserve your FE? Can you quantify how much future, uncertain FE is worth? How?

Follow up: If the blinds were going to 150/300 next hand how much more $EV would you be willing to give up in a push here?