The only useful LLM programs in the US are the Tax programs at NYU, Georgetown, Northwestern, and Florida. To much much lesser extent, the St. Johns Bankruptcy LLM places people into bankruptcy jobs in NYC.
If you want to practice any kind of litigation in the states you really really need to get a top J.D.
American employers won't care about the experience you have in foreign countries unless it's substantial and on-point. I've seen a few corporate associates at the seven sisters move over to American firms, but it's rare.