I adore
Elliott. I think it hits that perfect balance between unusual and familiar, and the sound is very dignified and masculine. Great choice! I agree, it does look more complete with your spelling and that is also my preferred spelling.
Noam Elliott is TONS better than
Noam Walter or
Noam Marcin.
My spellchecker doesn't like
Marcin, so that alone is indication enough for me that it shouldn't be at the top of your list. With
Walter,
Noam just sounds weird and dated. With
Elliott, it sounds fresh and unique.
Noam isn't my favorite choice, though, since I much prefer
Noah, but if you like
Noam Elliott, I would recommend it over either one that you currently have.