Canada should join the United States' currently underway "DDG 51  Destroyer" build programme:

https://fas.org/sgp/crs/weapons/RL32109.pdf 
https://www.gao.gov/products/GAO-16-613 
http://www.defenseindustrydaily.com/adding-arleigh-burkes-northrop-grumman-underway-06007/

For the last several years, the US govt has funded production of two DDG-51s per year for that country's navy, and plans to continue doing so until at least 2028

DDG-51s could be cost-effectively- & rapidly- jointly built by Canada's & US east coast ship yards.

RCN DDG-51s would:

- provide Canda with legitimately 21st-century-capable, multi-mission surface combatants, something that surely won't be the case if Canada stays with its unrealistically cheap, irresponsibly inadequate budget for its replacement Destroyers and Frigates.

- Enable the RCN to, for a change, provide legitimate, meaningful contributions to NATO & other allies' missions world wide, instead of continuing to be severe liabilities...