I really dont see the value of Capital One miles card - for the same 25K miles on any major airlines, AA, CO, UA, for example, you can do an open jaw and a stopover for domestic (including Alaska, excluding Hawaii) and Canada. That easily adds up to $500 to $1000 depends on how you use it.
We just did one trip in Sept, MIA/DFW/ANC, YVR/DFW/JAC, JAC/DFW/MIA, all on one 25K domestic planahead award on AA. If purchased, the ticket without JAC, just MIA/ANC, YVR/MIA would cost us $650 alone. Threw in JAC, the ticket went skyroketting to $1200.
You are far better off to sign up for airlines own mileage cards, especially now they all have promo going on with first year free. Pick an airline that serves your travel needs the most (the one that has a hub near your location, for example) and concentrate your spending on them.