I have used 3 of the 4 (haven't used flowmonk) and I can say that all 3 are going to get the job done just fine. If you have a paid airtable workspace, nobull would be a great option because its a free extension.
PowerImporter would be my next option - mostly based on price.
And then if you need two-way sync, then Whalesync would be a good fit.
