Yeah I would say that K2 is a smart choice. One of the few vitamins that I like to supplement with. You might re-think the vitamin C since antioxidant supplements (or at least c and e) tend to block some of the benefits of exercise http://www.pnas.org/content/106/21/8665.long
Exercise is all about doing a lot of oxidative stress to oneself, but the benefits far out-weight the negatives so long as it isn't chronic cardio. But we have to actually do the oxidative stress first. There is nothing in the supplement that can't be found in some vegetables.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!