Speaking of Dynamic ENB's, this is a must have if you enjoy scenic views and shadows, this ENB is the most demanding on my system for some reason, its not unplayable but its to the point where its going below my fps limit, I get around 50+ and 40 - 45 fps in populated places like towns (especially New Vegas). I used this ENB for a long time and I must say it is very nice, this ENB looks a lot more dynamic in my opinion, looks like it would go well with a movie style scene, with FPS, this is a tiny bit more demanding on my system but it might vary depending on the specs in your system and what other mods you have running, I get around 60 - 80 nearly everywhere. This is the ENB I personally use, I wouldn't even call this an ENB, as the name suggests, its a massive shader project designed through and ENB, The main reason I like this ENB is because its not massively straining on my system, I run a Radeon R7 260X with Fallout new vegas maxed out, and my fps always stays in the range of 50 - 100 depending on my locational (I also use over 100 mods). There are some amazing ENB's for Fallout New Vegas, here are a list of some:

Best fallout 4 enb