I see the problem as that if you want to have "State of the art" equipment you need to get on at an early Stage. The J-model acquistion had it's teething problems (don't all new aircraft, have a look at the F111 acquisition). However it has come good. Also lets not forget , if you buy off the plans , just like houses, you get a good discount. Have a look at the current price for purchasing J models.
Scrap the $300 million and buy 6 A400's