Don't know if you still want comments:
I liked Undine a lot - elegant, a bit spooky.
I found the text on the Open Doorway a bit busy - as in too much of it below your name. I also thought that the red text version of The Open Doorway (in your avatar so you probably picked it......
) not as good as the white one.
Also, if you are writing a series (don't know either way) you want to have the same "look" on both covers. In terms of text style and colour, also as to having title top, your name bottom or vice versa - but sticking to the same one. I seem to remember reading advice elsewhere, that until you are a "big name" you put the book title at the top as your name is not yet big enough to headline at the top of the cover.
Overall you might want to standardise on the font for your name, just as a branding "thing".