Both would be great, though maybe the Sixpoint cans are too big? Blue Point is also good, and local (Long Island), but I don't think makes cans.

Bitburger I've had on TXL-JFK, but other flights as well I think. Any of the big German breweries (Radeberger, Warsteiner, etc.) produce in large quantities that Delta could order, and would be vastly better than Bud Light, etc. They're also distributed in the US. My vote is for local, of course, but if the primary desire is to improve the beer quality, a large German producer might be the easiest and cheapest way to go.