1) Do you like it?
I love it. I prefer it above Eve, Ava, Chava, etc. I like it pronounced EE-vah or EH-vah.
2) Is it better than Ava?
Yes. (see above)
3) Does it go well with Sophia (any spelling)?
Yes.
4) Does it go better with Sophia or Sofia?
I like both, but for this, Sophia.