That worthless USS Zimwalt is nearly $4 Billion and congress wants 30+ of the stupid things. $800 K for 1 shell, $2 B to fully arm. Got stuck on maiden voyage and had to be towed back to Bath.
http://www.fi-aeroweb.com/Defense/DDG-1000-Zumwalt-Destroyer.html
I worked on the combat systems on the Arleigh Burke class. Those are fine ships and continue to work extremely well. Designed in the late 80s/early 90s, they have been adapted to anti-ballistic missile missions over the past 15 years and I think they are the best thing we have at that, old radar and all. We still make them but I imagine eventually they'll quit, Zumwalt's are too expensive and will soak up all the budget.