I am trying out dts headphone x 2.0 now, from the windows 10 app store. It has equalization filters for a bunch of headphones, including for my hd 650, so that is convenient. I will say though, it doesn't sound great on stereo sources, if you force it to process them. But I believe in using the same processing on everything, so one trick I have found is to use software dolby prologic II decoding in my media player - that creates 5.1 audio that helps trigger the processing (since it only works on surround sound), but also moves a lot of the stereo channels into the center channel, which seems to prevent comb filtering problems.
It comes with a balanced and spacious setting, and the spacious setting is actually pretty spacious. Both seem like a big step up from dolby atmos for headphone in terms of getting a good out of head experience.