I have little that is good to say about DT ammunition. My testing has shown that their velocity numbers are skewed, and performance is erratic at best. I have fired rounds from the same box which have showed signs of over pressure as well as squibs.
Hornady's 200gr. XTP will exceed all of your expectations for all three of your requirements. CorBon's 155 DPX will provide all the performance you will ever need for your first two scenarios.