I have two upcoming flights to SIN and BKK, and I will be back in Y for both. I am based at IAD but it looks like most routing have me going ORD-NRT for the transpac.

I have the option of flying United, ANA, or Singapore airlines to get there and I am a 100K on United. I value seat space, so I usually go exit row.

Questions:

1. Which has the best exit row seats (space, comfort)?
2. Which has free booze for Y?
3. Will I still have Star Alliance Lounge access w/ ANA or Sing in NRT and SIN? (I assume so)