XPS 8700 Connection to displayport

Hello All, This is my first post to the community. I have been trying to nail down answers to my question doing Bing searches but it has been frustrating. Put in a request for information to Dell Support several days ago but have not heard back from them yet. I did not see an option for recording my email address when I signed up my username so I don't know how this would be known. However my email is "bonnecarrere@cox.net". I bought an XPS 8700 in August with I7 4790, 16G Ram, 1TB HDD, Geforce GTX 745 GPU. I have been running this through an E173P monitor that I bought with my XP rig back in 2004 (still has great picture but it's 4.3 aspect ratio, 1024 res, VGA etc.) Upgrade time.

 My GPU has HDMI, DVI-D, and VGA output. I am looking at several monitors but especially looking at the Dell u2415 which has HDMI, Displayport, and Mindisplayport inputs. The questions that I have are: 1. Is the HDMI out on my card sufficient to carry this resolution (1920x1200) at 60fps. 2. A seemingly more difficult question to answer is: If for some reason I have issues with HDMI, can the DVI-D be adapted to the Displayport in on the monitor. I am assuming that my DVI-D ouput is dual link. I did a fair amount of searching for an answer to this question and have seen answers all over the place. Most of the adapters that I saw stated that they were "Displayport to DVI-D" never "DVI-D to Displayport". Does that matter? Can this be done? Anyway, before I order the monitor I really need to make sure that it will work with my GPU. Assistance will be appreciated. Thanks.