Thanks again for all the great info and advice. This was my first request for help since discovering FT recently (can't think what did I did b4 FT. Maybe I had a life...can't really remember ;-))
I'm overwhelmed. Thanks, guys!
Anyway, I still want to go with AA, that's my gut feeling, but living in Scotland, OneWorld partners to Europe are really expensive. I need to pay B or Y to qualify for any points at all with European partners, so I think I need to go with United. If only I had a US address - you guys are really fortunate with the FFP's, you know!! ;-)