If I were to chose any of those I would go with option 3, then add an R9 290 which you can find for $220, another 8 gb of ram, and an SSD drive. You would have a darn good system right there.
And to mention something about the 970, it only has 3.5 gb of fullspeed vram, and has problems if it goes over 3.5gb. The R9 290 is about the same speed as the 970 and is much cheaper. So I would avoid the 970 and go with a R9 290 or 290x, you can find a 290 for around 220, or the 290x lighting for 300.(Edit: not only that but NVidia lied about the specs of the 970. )
For a monitor it depends on what you want to get out of it, and what matters to you. Be it resolution, color quality, refresh rate. If you do end up with the R9 290 I would be on the look out for freesync monitors, do a quick google search for that and you will see what that is about.