Which system should the US marines give up?

If the F-35B, V-22, and New landing craft are the choices the marines have for cutting something. IYO what should go 1st?

http://www.themoneytimes.com/featured/20101113/marines-under-fire-pentagon-cuts-id-10141519.html

Which of these system is easily replaceable? what can they do without? which system change would require more cash and a change in doctrine?

Discuss