Studying the endgame versus studying tactics

How much more (or less) value does a ~1400 to ~1600 USCF player get from studying endgames (at a deeper level--so more complex) rather than tactics?

I'm not an expert but have been up to the 1850 level before on ICC standard time controls. And I have stayed at a Holiday Inn Express 

I would say go ahead and study endgames, and just do some tactical puzzles on the side. Endgames can be very tactical and postional in nature, so you're not hurting yourself at all by studying them.

Also with tactics there's not as much to "study" per se, once you're familiar with a lot of tactical themes, different types of checkmates, etc. really all there is to do is solve tactics puzzles which keep your chess board vision sharp.

With endgames there are more definite things to study I think. If all else fails just try to bring your king into play as soon as it's safe in the endgame. In the opening you don't want to bring your queen out too early, but in the endgame you don't want to bring your king out too late.

Also that's really good that you're not worried too much about studying openings. I think the best way to learn openings is just to play them in real games. In fact I took that even one step further....

I used to play chess on ICC without knowing many openings, I certainly didn't know any variations. What I would do is type "ECO" in the box as I was playing games, and the server will tell you what the opening is. I did this for most of the 5,000+ games I played there. 

What was cool about it was I learned all of the variations because I myself saw the need to play them, not because I read about them in a book. And that gives you a deeper understanding I think. You can basically do the same thing by downloading your PGN after a game and running it through a chess engine (I use Arena) to tell you what the opening was.