Welcome Herb.
Nice choice, I just finished my mixed set of 180 cards a couple months ago and continue to be obsessed with them. I even wrote about it, here's a link if possibly interested:
http://www.net54baseball.com/showthread.php?t=179326
Tough call on 1914 vs 1915, just do a master 200-card set! There are some REALLY tough 1914s and its hard to be a stickler on condition of those as some very rarely come up at auction, and that does not include the Pratt or Matty along with Joe make the big 3 in that set. Good luck!