Is it better to submit a paper to an important journal without the supervisor name or to a less important journal with the supervisor name? I am PhD student in computer engineering and visiting a foreign university. My project is near to the end and, since my colleague and I got excellent results, we are writing a scientific paper about it.
I would like to submit the paper to the top best journal in our field.

I sent the draft to my supervisor here, that replied that he does not think that the paper is going to be accepted by the top best journal. He suggested to submit it to another journal, that we can consider the 5th best journal in the field. He said that we can still submit it to the top journal if we want it, but, in that case, we have to remove his name from the author list.

So what should we do?

Should we remove his name from the author list and submit it to the top journal?
Or should we satisfy him and submit the paper to the 5th most prestigious journal?
In my view, using authorship as a bargaining chip like this is ethically inappropriate.

Either the supervisor's contributions to the paper warrant including him as an author, or they don't.

If they do, then he needs to be listed as a co-author no matter where you publish, and you need his agreement on where the paper is to be submitted.

If they don't, then he should not be listed as a co-author, no matter where you publish, and you and the remaining authors can make your own decision about where to submit (though you still might value his input).