I would look at what would be easy to replace if you miss it -- def BM66, SW, GB, Hobbit, and TZ, but not so easy for LOTR and TOTAN (so maybe give that more of a chance to click before you'd sell (unless you've already had it a long time)).
I would give TMNT some time before buying unless you really, really can't pass up the theme.
Great collection, good luck!