I've heard pretty good things about A New Generation from other MLP fans. I'll try checking it out at some point. 
Oooh yes, I love me some Equestria Girls! I really like how it crosses the fantasy atmosphere of MLP with a classic high school setting, and the ponies' personalities are translated to high school students really well. "Under Our Spell" from Rainbow Rocks is perpetually stuck in my head.
The shorts are pretty fun too. I should probably rewatch some of the Equestria Girls stuff at some point. A lot of my fondest memories of MLP are tied to the Equestria Girls stuff 
Trust me, you'll want your first impression of the Gen 5 main ponies to come from watching A New Generation (I have a feeling I know exactly which of the main ponies will very likely become your favorite

). Although Make Your Mark (the 3D Netflix series) is still months away, Tell Your Tale (the 2D YouTube series) will release its first episode later this week, so now would be a good time to get caught up with the movie.
Lately, regarding the upcoming Tell Your Tale series, I've been hearing some fans making unfavorable comparisons to Pony Life. I don't know what your thoughts are of the Pony Life series, but although I did watch every episode, I have no intentions on watching any of them ever again, as that kind of wacky show is just not for me.
Equestria Girls, on the other hand, I definitely enjoyed watching, in some ways even more that the main FiM series, probably because it's setting is a more relatable modern world. In fact, I've spent several years writing a fanfiction series which is basically an alternate version of the events of the entire Equestria Girls series, where the key difference is that its alternate world setting is not a human high school but a world made of Lego and populated by Lego Minifigures. If you're interested in reading it, I had posted a topic in the Written Word section (or simply follow the link in my signature) where I've provided links to all these stories on the MLP fanfiction site, fimfiction.net.
I have to say, it's kinda nice to have an actual discussion in this topic rather than just me reporting the latest news.